CN103276754A - Geotechnical engineering on-site detection method and device - Google Patents
Geotechnical engineering on-site detection method and device Download PDFInfo
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Abstract
The invention discloses a geotechnical engineering on-site detection method and device. The geotechnical engineering on-site detection device comprises a numerical reader end D and a sensor end S. The numerical reader end D is formed by a control module DP, a positioning module DGPS, a motivating module DM, a motivating antenna DMT, a communication module DC, a communication antenna DCT and a battery DPW. The sensor end S is formed by an induction antenna SMT, a power supply module SPW, a control module SP, an identification module SID, a detection module ST, a sensor SS, a communication module SC and a communication antenna SCT. The numerical reader end D adopts a wireless power supply mode to achieve power supply to the sensor end S, the sensor end S completes detection and sends detection data and sensing identification information to the numerical reader end D by means of a wireless communication mode, and the numerical reader end D records position information and stores the position information, the identification information and the detection data. The geotechnical engineering on-site detection device is high in detection efficiency, low in failure rate, capable of eliminating record errors, and long in service life.
Description
Technical field
The invention belongs to geotechnical engineering and detect the monitoring field, be specifically related to a kind of geotechnical engineering in-situ check and test method, also relate to a kind of geotechnical engineering on-site detecting device simultaneously.
Background technology
The foundation settlement monitoring of geotechnical engineering field, side slope safety monitoring, tunnel deformation monitoring etc. a large amount of detection monitoring project often lasts the several years, and it is also very complicated abominable to detect monitoring of environmental, even also faces the artificial destruction problem.
Existing technology mainly is manual detection, the problem that faces is that manual detection efficiency is low and fault rate is higher, be example to detect the vibrating string type sensor and the strain gauge transducer that use in a large number in the monitoring, present detection monitoring means mainly is manually-operated, and during detection, the staff carries reader to a measuring point, reader is connected with the sensor that is embedded in this point position temporarily, after reading detection numerical value, reader and sensor are disconnected, carry out the detection of next measuring point again.Hundreds of (even more substantial) measuring point is often arranged on the building site, this detection mode efficient is very low, sometimes for preventing artificial destruction consciously or unconsciously, the connecting line of sensor is hidden, hidden line repeatedly and take out line and cause detection efficiency lower, and sensor is connected with reader and disconnects and also cause various faults easily repeatedly.Owing to be manual record, the possibility with point position, sensor number misregistration is arranged in addition.
Can realize that also networking detects automatically, for example can realize that with optical fiber technology or wireless communication technique geotechnical engineering detects the networked automation detection monitoring in monitoring field, can significantly promote and detect monitoring efficient, but networked automation detects monitoring system maintenance cost height and system's fragility, it is too high that optical fiber technology detects the monitoring system expense, and its technology belongs to wired category, fibre circuit is easy to be damaged at complicated scene, each measuring point of wireless technology is restricted by power supply capacity, periodic replacement power supply or power in the solar energy mode and all to have convenience issue and disguised problem.Above-mentioned reason makes these technology be difficult to tackle complicated site environment, sometimes the equipment of high value, particularly battery, even face the possibility that artificial theft is arranged, therefore the application of networked automation detection monitoring is very not universal in the engineering, still adopts manual detection under a lot of situations.
Summary of the invention
The objective of the invention is to be to provide a kind of geotechnical engineering in-situ check and test method, easy to implement the method, the reader end have positioning function, sensor side have sensor identification effective detection, detect data, in the wireless power mode sensor side powered with wireless communication mode read sensor end, high efficiency when detecting, the automaticity height reads that data are convenient, fault rate is low, zero defect, long working life.
Another object of the present invention is to be to provide a kind of geotechnical engineering on-site detecting device, simple in structure, easy to operate, the reader end has positioning function, sensor side sensor identification to be arranged, detect data, wireless power mode to the effective detection of sensor side power supply with wireless communication mode read sensor end.
The present invention realizes the foregoing invention purpose by the following technical solutions:
Invention thinking: 1, can manage testing process automatically according to point position information and the automatic locating information at scene, avoid omitting measuring point.2, for fear of error logging measuring point numbering, should be able to record the identification information of on-the-spot positional information and the sensor of burying underground automatically.3, adopt wireless communication mode to read data, sensor side must need communication module and other corresponding circuit, its power supply just becomes the key factor of restriction working life, adopt the wireless electromagnetic induction power supply mode can reach this purpose, when reading data, encourage alternating electromagnetic field by the reader end to being embedded in on-the-spot sensor side, sensor side is responded to this electromagnetic field and is compiled electric charge, and sensor side is realized power supply temporarily.4, press for a kind of touchless in the real work, be convenient to the hidden working method that reads data, can reach this purpose with wireless communication mode, so not only can increase substantially the efficient that reads data, also can reduce fault rate, also be convenient to hidden sensor simultaneously.
A kind of geotechnical engineering in-situ check and test method, its step is as follows:
01. D is removable for the reader end, sensor side S is fixedly mounted on the scene of detection;
Reader end D is by manually carrying, also can be installed on the vehicle, building-site often is embedded with a plurality of sensor side S at a plurality of measuring points, for example the scene can have 512 measuring points of reaching to be embedded with sensor side S, in fact, the quantity of sensor side S is unconfined, strengthen memory space and can make up the reader end D that holds ten hundreds of sensor side S, only need to be equipped with a reader end D, respectively reader end D is moved near each measuring point during detection, read the detection data of a plurality of sensor side S respectively.
02. before on-the-spot the detection, the point position coordinate input reader end D with sensor side S place imports reader end D in proper order with error range DX and the measuring point detection of a setting;
Point position coordinate normally project planner is determined in advance, installs according to design point position coordinate during installation, considers error possible in the installation work, but also repetition measurement point position coordinate after the installation.The testing process in a common detection building site is lasted very long, can count in year, and the point position coordinate input reader end D with sensor side S place only need disposable finishing get final product before testing detects for the first time.
The error range DX that sets mainly is in order to control the duty of reader end D automatically, make reader end D away from measuring point the time, just be in the orientation direction state, enough near measuring point the time, enter detected state automatically, consider that any location technology has certain error, the error range DX of this setting should be more than or equal to the position error of corresponding location technology.For example, the position error of certain location technology is 10 meters, and the error range DX of setting just should be more than or equal to 10 meters.
To the situation of a plurality of measuring points, particularly measuring point quantity is more, and for example the situation of 512 measuring points considers that measuring point also may have certain disguised measure, sets the detection order, and reader end D indicates the position of next measuring point automatically, can stop the test leakage phenomenon.
03. the on-the-spot start of reader end D;
The point position coordinate that 04. reader end D is definite in proper order according to the measuring point detection of setting in the step 02 and demonstration should detect;
It also is feasible that the current measuring point that should detect manually is set, and this function is applicable to that because certain reason causes having no progeny in the detection, start is proceeded to detect again.
05. D shifts to the point position that should detect with the reader end;
06 reader end D shows the current position coordinates of locating module DGPS and the point position coordinate that should detect;
Show current position coordinates and the point position coordinate that should detect, can guide on-the-spot testing staff, help it easierly to find hidden measuring point, not only reduce the difficulty of seeking measuring point, the phenomenon that also can stop to omit measuring point.
07. the difference of current position coordinates and the point position coordinate that should detect during less than the error range DX that sets in the step 02, enters step 08, otherwise gets back to step 05;
08. the control module DP of reader end D control stimulating module DM produces alternating electromagnetic field by active antenna DMT at the active antenna DMT of reader end D periphery, the control module DP control communication module DC of reader end D enters wireless communication state;
When reader end D approaches the point position that should detect, just control reader end D automatically and enter detected state, just the de-energisation alternating electromagnetic field just drives communication module, can save electric energy.
09. the active antenna DMT of reader end D is moved on near the induction antenna SMT of sensor side S in 3 meters scopes;
Reader end D realizes that to the sensor side S beyond the certain distance technology of power supply belongs to the prior art category with wireless mode, this power supply distance in the practical application (active antenna DMT and induction antenna SMT spacing) is not to be the bigger the better, though can realize that the distance of wireless power is more big, the accuracy of mobile active antenna DMT requires more low in the manually-operated, operation also with regard to Vietnamese side just, the excessive fillip of stimulating module DM that will require of wireless power spacing (active antenna DMT and induction antenna SMT spacing) is enough big, active antenna DMT and induction antenna SMT physical dimension must be enough big, the aerial coil number of turn must be abundant, the alternating electromagnetic field of excitation must be enough strong, has inconvenience again.Usually should be according to the concrete parameter of using on-the-spot actual conditions design active antenna DMT with stimulating module DM, in 3 meters scopes be one in conjunction with geotechnical engineering testing characteristics, synthetic operation convenience with operate a suitable index of accuracy.
Attainable power supply distance not only with active antenna DMT near the intensity of electromagnetic field relevant, also can be subjected to the influence of the direction of active antenna DMT and induction antenna SMT, right more accurate of direction can realize that the distance of powering is more big.In order to reduce antenna directivity to operating personnel's accuracy operation requirement, can adopt a plurality of coil combination to constitute active antenna in the practical application.
Communication distance between reader end D and the sensor side S (communication antenna DCT and communication antenna SCT spacing) is enough big with respect to wireless power distance (active antenna DMT and induction antenna SMT spacing), prior art is easy to realize the above communication spacing of tens of rice, what therefore restrict reader end D and sensor end S spacing in the practical application is wireless power spacing (active antenna DMT and induction antenna SMT spacing), rather than communication spacing (communication antenna DCT and communication antenna SCT spacing).
The precision of common civilian location technology is not high, and the error range DX that arranges in the step 02 should be greater than the position error of location technology, this error range DX that is used for automatic control stimulating module and communication module that just causes arranging in the step 02 is often greater than the wireless power distance, like this when the spacing of reader end D and measuring point causes control module DP to start stimulating module DM and communication module DC less than error range DX, the distance of reader end D and sensor side S is still greater than the wireless power distance, sensor side S does not enter duty, therefore needs further the active antenna DMT of reader end D to be shifted to the induction antenna SMT of sensor side S.
Distance is also harmless if the error range DX that step 02 arranges is not more than wireless power, when the result of this moment is control module DP startup stimulating module DM and communication module DC, enters the state of stimulus sensor end S work at once.
10. the induction antenna SMT of sensor side S and supply module SPW inductive electromagnetic energy in alternating electromagnetic field is realized control module SP, detection module ST, identification module SID to sensor side S, communication module SC power supply;
11. the control module SP of sensor side S control detection module ST finishes detection and obtains detecting data, reads the identification information among the identification module SID;
Sometimes, a point position may have a plurality of different types of sensors to be respectively applied to sensed water level, detects soil pressure, detect angle of inclination etc., this moment, detection module ST can be a plurality of, for example had to reach the detection that 10 detection module ST are respectively applied to dissimilar parameters.Sometimes, a point position also may have the sensor of a plurality of same kinds, for example, detect the nearly soil pressure of 50 different depths respectively in same position, this moment, a detection module ST can distinguish each sensor of gating under the control of control module SP, finished the detection task of dozens of sensor of the same type.These functions all belong to the prior art category.
12. the control module SP of sensor side S control communication module SC will detect data by communication antenna SCT and identification information sends to reader end D;
13. the control module DP of reader end D reads the current position coordinates of locating module DGPS, shows and stores this position coordinates, identification information, detection data;
Also point position coordinate, identification information, detection data can be sent it back engineering detecting administrative department data designated central station in real time with wireless mode where necessary, these technology belong to the prior art category.
14. the control module DP of reader end D stops the incentive functions of stimulating module DM, withdraws from excitation alternating electromagnetic field state, the function of terminating communication module DC withdraws from communication state;
15. get back to step 04, carry out the detection of next point position, finish until on-the-spot testing.
After on-the-spot detection finishes, with movable storage device or wireless communication mode the detection data among the reader end D are produced.
A kind of geotechnical engineering on-site detecting device, this device comprises reader end D and sensor side S, and reader end D comprises power supply DPW, control module DP, display module DSCR, locating module DGPS, stimulating module DM, active antenna DMT, communication module DC and communication antenna DCT.Sensor side S comprises induction antenna SMT, supply module SPW, control module SP, identification module SID, detection module ST, sensor SS, communication module SC and communication antenna SCT.The checkout gear concrete structure of a kind of wireless telecommunications and wireless power is seen Fig. 1.It is characterized in that:
The power supply DPW of reader end D is connected with control module DP, display module DSCR, locating module DGPS, stimulating module DM, communication module DC respectively;
The control module DP of reader end D is connected with power supply DPW, display module DSCR, locating module DGPS, stimulating module DM, communication module DC respectively;
The display module DSCR of reader end D is connected with power supply DPW, control module DP;
The locating module DGPS of reader end D is connected with power supply DPW, control module DP;
The stimulating module DM of reader end D is connected with power supply DPW, control module DP, active antenna DMT respectively;
The active antenna DMT of reader end D is connected with stimulating module DM;
The active antenna DMT of reader end D and the connecting line of stimulating module DM should have certain length, are convenient near the induction antenna SMT that on-the-spot testing staff moves on to active antenna DMT according to the step 09 in a kind of geotechnical engineering in-situ check and test method sensor side S in 3 meters scopes.
The communication module DC of reader end D is connected with power supply DPW, control module DP, communication antenna DCT respectively;
The communication antenna DCT of reader end D is connected with communication module DC;
When reader D carries out testing, control module DP enable actuation module DM, near stimulating module DM excitation active antenna DMT space active antenna DMT produces alternating electromagnetic field, and this alternating electromagnetic field will detect and will detect data and identification data sends to the energy that reader end D provides necessity for sensor side S finishes.Then, control module DP control communication module DC waits for by communication antenna DCT and receives detection data and the identification data of passing back from sensor side S.After finishing reception, control module DP control locating module DGPS reads current locator data, and control display module DSCR will detect data, identification data, locator data and show.Efficiently, automatically, zero defect finishes testing.
The induction antenna SMT of sensor side S is connected with supply module SPW;
The length of the induction antenna SMT of sensor side S and the connecting line of supply module SPW depends on the detection demand, if the resonance rectifier system is adopted in excitation more by force, the connecting line of induction antenna SMT and supply module SPW can be longer, and this moment, induction antenna SMT and sensor side S main body can have certain spacing.
The supply module SPW of sensor side S is connected with induction antenna SMT, control module SP, identification module SID, detection module ST, communication module SC respectively;
The control module SP of sensor side S is connected with supply module SPW, identification module SID, detection module ST, communication module SC respectively;
The identification module SID of sensor side S and supply module SPW, control module SP;
The detection module ST of sensor side S is connected with supply module SPW, control module SP, sensor SS respectively;
The sensor SS of sensor side S is connected with detection module ST;
Sensor SS often separates with the main body of sensor side S, and the length of the connecting line of itself and detection module ST depends on concrete detection demand, if the unsuitable exceedance rice of charge type sensor connecting line, the sensor connecting line of voltage-type can reach tens of rice.And if adopt integrated sensor based on MEMS, sensor SS is integrated on the sensor side S main body usually.
The communication module of sensor side S is connected with supply module SPW, control module SP, communication antenna SCT respectively.
The induction antenna SMT that is in the sensor side S in the alternating electromagnetic field of certain intensity can produce induced electromotive force, and jointly this induced electromotive force being converted into supply module SPW can be for the power supply of sensor side S work.Under this power supply is supported, sensor side S the control module SP control detection module ST work detection data, the control identification module SID that obtain sensor SS obtain identification data, control communication module SC is transferred to reader end D by detection data and the identification data that communication antenna SCT will obtain.Efficiently, automatically, zero defect finishes testing.
The invention has the beneficial effects as follows: 1.. the reader end utilizes locating information to realize the measuring point management function, can stop the test leakage phenomenon, and the reader end utilizes locating information to realize the automatic state conversion of controlling in the testing process simultaneously, saves the electrical source consumption of reader end.2.. the reader end has positioning function, and sensor side has sign, and when reading data, disposable field position, sensor identification, the testing result of reading can be stopped the misregistration of manual read when fetching data.3.. sensor side adopts the electromagnetic induction power supply technique of no battery, has eliminated the restriction of battery life to the sensor side working life, has prolonged the working life of sensor side significantly.Under a lot of situations, it is very difficult that complicated site environment is changed battery, even may not change battery, if adopt the powered battery mode, the working life of sensor side certainly will be subjected to the restriction of battery life.Adopt no battery scheme, in fact make the working life of sensor side be tending towards unlimited and Maintenance free.4.. wireless mode is realized the communication of reader end and sensor side, when reading data without the touch sensor end, promote significantly and read the efficient that detects data in the testing process, reduce fault rate significantly, simultaneously owing to adopted the contactless mode that reads, sensor side can be done certain disguised measure, avoid by artificial destruction to a certain extent.5.. above-mentioned four usefulness make on-the-spot testing as long as a non-technical personnel is touring according to the guide of reader end, the on-the-spot very simple and zero defect of testing, the construction cost of detection system is low, the maintenance cost of detection system almost nil (only limiting to replacing battery or the charge maintenance of reader end), working strength significantly reduces, and the efficient of testing simultaneously significantly improves.For example; the geotechnical engineering scene that 100 measuring points are arranged; 30 meters of average each measuring point travel distances; about 20 seconds consuming time; by original working method; seek measuring point; on line; read data; record data; take out stitches; protection; cover measuring point and all need the strict careful operation of staff; comprise the walking consuming time interior average measuring point is consuming time should be about 2 minutes; touring 100 measuring points detect total about 200 minutes consuming time approximately; by technology of the present invention; near measuring point, the active antenna of reader end is shifted to measuring point and only need the consuming time of several seconds magnitude; do not need the staff precisely to operate yet; comprise walking consuming time interior average measuring point is consuming time should be in 30 seconds, touring 100 measuring points detect total about 50 minutes consuming time approximately, operating efficiency raising 300%.
Description of drawings
Fig. 1 is a kind of geotechnical engineering on-site detecting device structural representation.
Wherein: reader end D, sensor side S, power supply DPW, control module DP, display module DSCR, locating module DGPS, stimulating module DM, active antenna DMT, communication module DC, communication antenna DCT, induction antenna SMT, supply module SPW, control module SP, identification module SID, detection module ST, sensor SS, communication module SC, communication antenna SCT.
Fig. 2 (a) is a kind of reader end D structural representation.
Fig. 2 (b) is a kind of reader end D circuit theory diagrams.
Fig. 3 (a) is a kind of sensor side S structural representation.
Fig. 3 (b1) is a kind of example 1 sensor side S circuit theory diagrams (resistance strain gages+2.4G wireless transmission+EMR electromagnetic resonance power supply).
Fig. 3 (b2) is a kind of example 2 sensor side S circuit theory diagrams (vibratory string displacement meters+433M wireless transmission+charge pump power supply).
Fig. 4 is the detected state flow chart of a kind of reader end D.
Fig. 5 (a) is the workflow diagram of a kind of example 1 sensor side S.
Fig. 5 (b) is the workflow diagram of a kind of example 2 sensor side S.
Fig. 6 is a kind of structure chart of capacitive charge pump.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing thereof the present invention is further described, it is emphasized that, though the present invention will set forth in conjunction with example, this is not to refer to that the present invention is defined in these examples, and these examples only are used for showing the exploitativeness of technical scheme of the present invention.Among the present invention, the detection module ST of sensor side S and sensor SS can be based on the foil gauge detection techniques, can be based on the vibrating string type sensor technology, and also can be based on type sensor technology such as other voltage charge inductance capacitances; The communication module DC of reader end D and the communication module SC of sensor side S can be based on the technology of 2.4G wireless transmission, can be based on the technology of 433M wireless transmission, and also can be based on other Radio Transmission Technology; The induction antenna SMT of sensor side S and supply module SPW can also can assemble electric charge based on charge pumping technique and realize the short-term power supply based on the direct commutation supply voltage of resonance principle when electromagnetic field is more weak relatively.These technology all belong to the prior art category.
Embodiment 1:
A kind of geotechnical engineering on-site detecting device
,This is that a sensor SS based on sensor side S is foil gauge, and all based on the technical scheme of 2.4G wireless transmission, supplier's formula of sensor side S is based on the direct commutation supply voltage of resonance principle for the communication module DC of reader end D and the communication module SC of sensor side S.Reader end D structured flowchart is seen Fig. 2 (a), and the circuit theory diagrams of reader end D are seen Fig. 2 (b), and the structured flowchart of sensor side S is seen Fig. 3 (a), and the circuit theory diagrams of sensor side S are seen Fig. 3 (b1), and the detected state flow process of reader end D is seen Fig. 4.
This device comprises reader end D and sensor side S, and reader end D comprises power supply DPW, control module DP, display module DSCR, locating module DGPS, stimulating module DM, active antenna DMT, communication module DC and communication antenna DCT.Sensor side S comprises induction antenna SMT, supply module SPW, control module SP, identification module SID, detection module ST, sensor SS, communication module SC and communication antenna SCT.
The power supply DPW of reader end D comprises the ICR18650-7.4V-3000mA lithium battery, LDO chip LT1963-5V, LDO chip AMS1117-3.3V, when reader end D is in open state, ICR18650-7.4V-3000mA lithium battery and LT1963-5V, the input of AMS1117-3.3V links to each other, form current supply circuit, this moment, two LDO began to start conversion, export 5.0V and 3.3V DC voltage respectively, by behind the filter capacitor filter out power ripple, be connected respectively to control module DP then, display module DSCR, locating module DGPS, stimulating module DM, the power input of communication module DC.
The control module DP of reader end D comprises the enhancement mode Series of MCU STM32F103ZET6 of ST company, passive crystal oscillator DSX630G-8MHz, electrify restoration circuit and peripheral resistance capacitance, mainly is responsible for the reading and transmit of generation, data of control signal.Passive crystal oscillator DSX630G-8MHz links to each other by the electric capacity with 2 22pF, forms oscillating circuit, is connected to the clock input pin of microcontroller STM32F103ZET6 then; The reset circuit of being made up of button, resistance, electric capacity is connected to the reset pin of microcontroller STM32F103ZET6, realizes the function of system power-on reset or hand-reset.
The control module DP of reader end D obtains power supply by being connected with power supply DPW; The control module DP of reader end D is connected with display module DSCR by parallel bus, drives LCD, realizes the Presentation Function of data; The control module DP of reader end D is connected with locating module DGPS by universal serial bus, obtains the geographical location information of current measuring point; The control module DP of reader end D encourages the output alternating electromagnetic field by control port and stimulating module DM; The control module DP of reader end D is connected with communication module DC by universal serial bus, realizes the radio communication between reader end D and the sensor side S.
The display module DSCR of reader end D comprises 3.5 cun LCD TM035PDHV08, lcd controller ILI9486, backlight control circuit.Control module DP links to each other with control bus with the data/address bus of ILI9486 by inner FMSC bus, drives lcd controller ILI9486 by coding, realizes the demonstration of character, numeral, figure etc.; The PWM that control module DP produces drives signal, is connected to the control pin of display module DSCR backlight control circuit, realizes the adjusting of LCD brightness.
The display module DSCR of reader end D is connected with power supply DPW and obtains power supply; The display module DSCR of reader end D is connected with control module DP by parallel bus, drives display module DSCR by control module DP, finishes collecting the function that sensor signal shows.
The locating module DGPS of reader end D comprises GPS module (GPS_01HW of Huawei) and GPRS antenna, GPS_01HW is connected by feeder line with the GPRS antenna, GPS_01HW is connected by universal serial bus (RS-232) with control module DP, obtains geographical location information.
The locating module DGPS of reader end D is connected with power supply DPW and obtains power supply; The locating module DGPS of reader end D is connected with control module DP by universal serial bus.
The stimulating module DM of reader end D comprises control FET IRF540, gauge tap triode S8050, pull-up resistor.The control module DP of reader end D is by the pulse enable signal of output 100KHz, enable inverter circuit (namely controlling FET IRF540, gauge tap triode S8050 alternate conduction), thereby convert direct current to alternating current, the active antenna DMT of excitation reader end D.
The stimulating module DM of reader end D is connected with power supply DPW and obtains power supply; The stimulating module DM of reader end D is connected with control module DP; The stimulating module DM of reader end D is connected with active antenna DMT.
The active antenna DMT of reader end D comprises 5mH-20mH inductance, 220uF-470uF electric capacity, and inductance and electric capacity connect to form closed space concussion loop.The alternating current that the stimulating module DM of reader end D produces is applied to the active antenna DMT two ends of reader end D, by Maxwell's Theory of Electromagnetic Field as can be known, therefore the magnetic field that the electric field that changes can evoke variation, can produce alternating magnetic field around the active antenna DMT of reader end D.
The active antenna DMT of reader end D is connected with power supply DPW and obtains power supply; The active antenna DMT of reader end D is connected with stimulating module DM.
The communication module DC of reader end D comprises communication module (DIGI_XBP24), the whip antenna of U.S. DIGI company.GIGI_XBP24 is connected with whip antenna by feeder line.
The communication module DC of reader end D is connected with power supply DPW and obtains power supply; The communication module DC of reader end D is connected with control module DP by universal serial bus; The communication module DC of reader end D is connected with communication antenna DCT by feeder line.
The communication antenna DCT of reader end D comprises 220uH inductance, 10uF electric capacity, resistance composition, and 220uH inductance and 10uF capacitances in series form the detection gain circuitry.
The communication antenna DCT of reader end D is connected with communication module DC by feeder line.
The induction antenna SMT of sensor side S comprises that 2mH-50mH inductance, 2000pF-9100pF electric capacity are in parallel and constitutes the LC resonant tank.The induction antenna SMT of sensor side S is by the alternating magnetic field around the active antenna DMT of induction reader end D, by Maxwell's Theory of Electromagnetic Field as can be known, the electric field that variation can be evoked in the magnetic field that changes, therefore the induction antenna SMT two ends of sensor side S can produce alternating current, after handling by rectification, filtering, voltage stabilizing etc., for the supply module SPW of sensor side S provides power supply.
The supply module SPW of sensor side S comprises rectifier bridge (2W10 of Toshiba), super capacitor (the farad capacitor EECS5R5V474 of Panasonic), Zener diode 2CW53/5.1V, the output of rectifier bridge 2W10 and farad capacitor EECS5R5V474 connect and compose tank circuit, be connected to the two ends of Zener diode 2CW53/5.1V, make output voltage be limited in 5.1V, the surge voltage of avoiding tank circuit to produce produces back-end circuit smashes.In addition, because the just single power supply that supply module SPW provides, and sensor side S need provide the power supply ability operate as normal of multiple voltage form.Therefore, the power pack of sensor side S also comprises detection power supply and control power supply two parts.Wherein, detect power supply and formed by polarity inversion power supply changeover device ICL7660 and peripheral circuit, for detection module ST provides work required negative supply.Control power unit formed by LDO AMS1117-3.3 and filter capacitor, for sensor side S each several part provide work required+the 3.3V voltage-stabilized power supply.
The supply module SPW of sensor side S is connected with induction antenna SMT, links to each other with control module SP, identification module SID, communication module SC simultaneously, for each several part provides operate as normal required electric energy.
The control module SP of sensor side S comprises DIGI_XBP24 and peripheral circuit, and DIGI_XBP24 set identifier module SID, communication module SC and communication antenna SCT finish the coding to sensor identification, collection and the transmission of sensing data in one.The supply module SPW output of concrete workflow: sensor side S is connected on startup/dormancy control pin of DIGI_XBP24, when the supply module SPW of sensor side S output is high level, the control module SP work of start sensor end S, read the output signal of detection module ST, because the output signal of detection module ST is analog signal, therefore also need by the analog-digital converter of inside analog signal conversion to be become data signal, at last, the sensing data that collects together being sent to reader end D together with identification information handles.
The control module SP of sensor side S is connected with supply module SPW; Sensor side S control module SP be connected with detection module ST.
The detection module ST of sensor side S by the precision resistance of strain transducer and 3 350 ohm form Huygens's electric bridge, instrument amplifier INA128 forms.Utilize Huygens's bridge method, convert the miniature deformation of strain transducer to voltage, be connected to the input of instrument amplifier INA128, amplify the control module SP that is connected to sensor side S after the processing by instrument amplifier INA128.
A kind of geotechnical engineering in-situ check and test method, its step is as follows:
01. D is removable for the reader end, 512 sensor side S are fixedly mounted on the scene of detection;
02. before on-the-spot the detection, the point position coordinate input reader end D with sensor side S place imports reader end D in proper order with error range DX and the measuring point detection of a setting;
03. the on-the-spot start of reader end D;
The point position coordinate that 04. reader end D is definite in proper order according to the measuring point detection of setting in the step 02 and demonstration should detect;
05. D shifts to the point position that should detect with the reader end;
06 reader end D shows the current position coordinates of locating module DGPS and the point position coordinate that should detect;
07. the difference of current position coordinates and the point position coordinate that should detect during less than the error range DX that sets in the step 02, enters step 08, otherwise gets back to step 05;
08. the control module DP of reader end D control stimulating module DM produces alternating electromagnetic field by active antenna DMT at the active antenna DMT of reader end D periphery, the control module DP control communication module DC of reader end D enters wireless communication state;
1.. the inverter circuit among the control module DP enable actuation module DM of reader end D.
2.. the inverter circuit among the stimulating module DM of reader end D produces alternating current.
3.. the active antenna DMT of reader end D produces alternating electromagnetic field under the excitation of alternating current.
4.. the control module DP of reader end D waits for the data that receiving sensor end S sends.
09. the active antenna DMT of reader end D is moved on near the induction antenna SMT of sensor side S in 1 meter scope;
10. the induction antenna SMT of sensor side S and supply module SPW inductive electromagnetic energy in alternating electromagnetic field is realized control module SP, detection module ST, identification module SID to sensor side S, communication module SC power supply;
The workflow of sensor side S is seen Fig. 5 (a)
1.. the induction antenna SMT of sensor side S produces induced-current in alternating electromagnetic field.
2.. the electric charge that induction antenna SMT produces among the supply module SPW of sensor side S reaches power threshold up to the quantity of electric charge that compiles.
3.. to control module SP, detection module ST, the communication module SC power supply of sensor side S.
11. the control module SP of sensor side S control detection module ST finishes detection and obtains detecting data, reads the identification information among the identification module SID;
12. the control module SP of sensor side S control communication module SC will detect data by communication antenna SCT and identification information sends to reader end D;
13. the control module DP of reader end D reads the current position coordinates of locating module DGPS, shows and stores this position coordinates, identification information, detection data;
14. the control module DP of reader end D stops the incentive functions of stimulating module DM, withdraws from excitation alternating electromagnetic field state, the function of terminating communication module DC withdraws from communication state;
15. get back to step 04, carry out the detection of next point position, finish until on-the-spot testing.
After on-the-spot detection finishes, will detect data with USB flash disk and wireless communication mode and produce.
Embodiment 2:
A kind of geotechnical engineering on-site detecting device, this is the example of a sensor side S end, the sensor SS that is based on sensor side S is the vibratory string displacement meter, all based on the technical scheme of 433M wireless transmission, supplier's formula of sensor side S is to adopt capacitive charge pump to realize power supply to the communication module SC of sensor side S.The circuit theory diagrams of sensor side S are seen Fig. 3 (b2), and the workflow of sensor side S is seen Fig. 5 (b).
The favourable part of charge pumping technique is to assemble electric charge in more weak relatively alternating electromagnetic field, make that the active antenna DMT of reader end D can be when the induction antenna SMT of range sensor end S be farther, for example in 3 meters scopes, realize sensor side S is powered.In more weak alternating electromagnetic field, the induced electromotive force that the induction antenna induction obtains is very faint, direct voltage is low excessively, and this moment, the capacity of storage capacitor also can not be assembled more multi-charge greatly again, must utilize charge pumping technique booster tension value to realize assembling the more purpose of multi-charge.
The structure chart of capacitive charge pump is seen Fig. 6.Its course of work is divided into two stages, the phase I, close by gauge tap S1, S2, S3, S4 open, capacitor C 1 is charged, up to the value of capacitor C 1 both end voltage during for Uin charging finish; Second stage, gauge tap S1, S2 open, S3, S4 closure, this moment, the voltage of capacitor C Hold just doubled.Utilize this principle, the switch progression that increases charge pump can be realized the booster tension value, thereby assembles the purpose of electric charge in a large number, when accumulation surpasses certain voltage threshold, the electric charge of assembling is discharged.
The induction antenna SMT of sensor side S is made up of 9100pF electric capacity, 2mH inductance.9100pF electric capacity links to each other with the 2mH inductance and constitutes the electromagnetic field inducing loop, and the induction antenna SMT of sensor side S is connected with supply module SPW.
The supply module SPW of sensor side S is by rectifier bridge KPB307, capacitive charge pump AAT3110, and Zener diode 2CW53/5.1V forms.The induction antenna SMT of sensor side S receives the alternating magnetic field that reading machine end D produces, produce induced voltage in inside, be rectified into DC voltage by rectifier bridge KPB307 then, through capacitive charge pump AAT3110 accumulation is got up again, when the electric charge of assembling reaches certain threshold value, input to Zener diode 2CW53/5.1V, S provides constant voltage dc source for sensor side.In addition, because the just single power supply that supply module SPW provides, and sensor side S need provide the power supply ability operate as normal of multiple voltage form.Therefore, the power pack of sensor side S also comprises vibratory string power supply and control power supply two parts.Wherein, the vibratory string power supply is made up of LDO AMS1117-2.5 and filter capacitor, for the detection module ST of sensor side S provides+the 2.5V reference voltage source.Control power unit formed by LDO AMS1117-3.3 and filter capacitor, for sensor side S each several part provide work required+the 3.3V voltage-stabilized power supply.
Compared to super capacitor, it is little that capacitive charge pump AAT3110 has a volume, and low cost and other advantages is fit to be applied to volume and the higher occasion of cost requirement.
The supply module SPW of sensor side S is connected with induction antenna SMT; The output of the supply module SPW of sensor side S is connected to the input of LDO AMS1117-3.3,3.3V power supply through LDO AMS1117-3.3 conversion output is connected to control module SP, communication module SC, detection module ST, for it provides operate as normal required power supply.
The control module SP of sensor side S is made up of microcontroller C8051F330 and peripheral circuit thereof.Wherein, the function of identification module SID is realized by one section solid piece number of filling among the inner one section ROM of C8051F330.
The control module SP of sensor side S links to each other with detection module ST, read the signal of detection module ST output, link to each other with communication module SC by universal serial bus (RS-232) again, the sensor signal that collects is sent to reading machine end D together with identification information by communication module SC.
The detection module ST of sensor side S is made up of multivibrator NE555, SCR07 and 20K slide rheostat, and multivibrator NE555 is connected with SCR07 by the 20K slide rheostat.Sensor side S detection module ST link to each other the pick-up transducers current demand signal with type vibration wire displacement transducer SS; The output of the detection module ST of sensor side S is connected with control module SP.
The communication module SC of sensor side S is made up of wireless radio frequency modules SI4432.Be connected by universal serial bus (RS-232) between the communication module SC of sensor side S and the control module SP of sensor side S, the control module SP of sensor side S together sends to the communication module SC of sensor side S with the sensor signal that collects together with identification information, and the communication module SC of sensor side S carries out data interaction by wireless mode and reader end D then.
The control module SP of sensor side S is made up of microcontroller C8051F330 and peripheral circuit thereof.Wherein, the function of identification module SID is realized by one section solid piece number of filling among the inner one section ROM of C8051F330.
The control module SP of sensor side S links to each other with detection module ST, read the signal of detection module ST output, link to each other with communication module SC by universal serial bus (RS-232) again, the sensor signal that collects is sent to reading machine end D together with identification information by communication module SC.
The detection module ST of sensor side S is made up of multivibrator NE555, SCR07 and 20K slide rheostat, and multivibrator NE555 is connected with SCR07 by the 20K slide rheostat.Sensor side S detection module ST link to each other the pick-up transducers current demand signal with type vibration wire displacement transducer SS; The output of the detection module ST of sensor side S is connected with control module SP.
The communication module SC of sensor side S is made up of wireless radio frequency modules SI4432.Be connected by universal serial bus (RS-232) between the communication module SC of sensor side S and the control module SP of sensor side S, the control module SP of sensor side S together sends to the communication module SC of sensor side S with the sensor signal that collects together with identification information, and the communication module SC of sensor side S carries out data interaction by wireless mode and reader end D then.
Claims (2)
1. geotechnical engineering in-situ check and test method, its step is as follows:
A. reader end D is removable, and 1-512 sensor side S are fixedly mounted on the scene of detection;
B. before on-the-spot the detection, the point position coordinate input reader end D with sensor side S place imports reader end D in proper order with error range DX and the measuring point detection of a setting;
C. the on-the-spot start of reader end D;
D. reader end D determines in proper order according to the measuring point detection of setting among the step B and shows the point position coordinate that should detect;
E. reader end D is shifted to the point position that should detect;
F. reader end D shows the current position coordinates of locating module DGPS and the point position coordinate that should detect;
When G. the difference of current position coordinates and the point position coordinate that should detect is less than the error range DX that sets among the step B, enters step H, otherwise get back to step e;
H. the control module DP of reader end D control stimulating module DM produces alternating electromagnetic field by active antenna DMT at the active antenna DMT of reader end D periphery, and the control module DP control communication module DC of reader end D enters wireless communication state;
I. the active antenna DMT of reader end D is moved on near the induction antenna SMT of sensor side S in 3 meters scopes;
J. the induction antenna SMT of sensor side S and supply module SPW inductive electromagnetic energy in alternating electromagnetic field is realized control module SP, detection module ST, identification module SID to sensor side S, communication module SC power supply;
K. the control module SP of sensor side S control detection module ST finishes to detect and obtains detecting data, reads the identification information among the identification module SID;
L. the control module SP of sensor side S control communication module SC will detect data by communication antenna SCT and identification information sends to reader end D;
M. the control module DP of reader end D reads the current position coordinates of locating module DGPS, shows and stores this position coordinates, identification information, detection data;
N. the control module DP of reader end D stops the incentive functions of stimulating module DM, withdraws from excitation alternating electromagnetic field state, and the function of terminating communication module DC withdraws from communication state;
O. get back to step D, carry out the detection of next point position, finish until on-the-spot testing.
2. geotechnical engineering on-site detecting device of realizing the described method of claim 1, this device is made up of reader end D and sensor side S, it is characterized in that: reader end D comprises power supply DPW, control module DP, display module DSCR, locating module DGPS, stimulating module DM, active antenna DMT, communication module DC and communication antenna DCT, and the power supply DPW of reader end D is connected with control module DP, display module DSCR, locating module DGPS, stimulating module DM, communication module DC respectively; The control module DP of reader end D is connected with power supply DPW, display module DSCR, locating module DGPS, stimulating module DM, communication module DC respectively; The display module DSCR of reader end D is connected with power supply DPW, control module DP; The locating module DGPS of reader end D is connected with power supply DPW, control module DP; The stimulating module DM of reader end D is connected with power supply DPW, control module DP, active antenna DMT respectively; The active antenna DMT of reader end D is connected with stimulating module DM; The communication module DC of reader end D is connected with power supply DPW, control module DP, communication antenna DCT respectively; The communication antenna DCT of reader end D is connected with communication module DC;
Sensor side S comprises induction antenna SMT, supply module SPW, control module SP, identification module SID, detection module ST, sensor SS, communication module SC and communication antenna SCT, and the induction antenna SMT of sensor side S is connected with supply module SPW; The supply module SPW of sensor side S is connected with induction antenna SMT, control module SP, identification module SID, detection module ST, communication module SC respectively; The control module SP of sensor side S is connected with supply module SPW, identification module SID, detection module ST, communication module SC respectively; The identification module SID of sensor side S and supply module SPW, control module SP; The detection module ST of sensor side S is connected with supply module SPW, control module SP, sensor SS respectively; The sensor SS of sensor side S is connected with detection module ST; The communication module of sensor side S is connected with supply module SPW, control module SP, communication antenna SCT respectively.
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