CN102759390A - Water level monitoring method by radio frequency communication method - Google Patents
Water level monitoring method by radio frequency communication method Download PDFInfo
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- CN102759390A CN102759390A CN2012102464641A CN201210246464A CN102759390A CN 102759390 A CN102759390 A CN 102759390A CN 2012102464641 A CN2012102464641 A CN 2012102464641A CN 201210246464 A CN201210246464 A CN 201210246464A CN 102759390 A CN102759390 A CN 102759390A
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Abstract
The invention relates to a water level monitoring method by radio frequency communication method, comprising the following steps: (1) a data processing terminal is connected with a radio frequency reader; if the connection is failed, the equipment is checked and then the radio frequency reader is re-connected; if the connection is successful, the next step is performed; (2) the data processing terminal sends a read operation control instruction to the radio frequency reader; (3) the radio frequency reader reads a radio frequency identification and sends the read data to the data processing terminal; (4) according to the data returned by the radio frequency reader, the data processing terminal looks up relevant installation position information of the radio frequency identification by combining a comparison database which is generated and stored in the data processing terminal during the write-in process of the radio frequency identification data; (5) the data processing terminal compares the read and the unread position information of the radio frequency identification according to the same water level monitoring spot and calculates the range of the present water level. The beneficial effects of the method are simplified equipment installation and convenience in realizing multi-spot water level monitoring.
Description
Technical field
Monitoring technical field of the present invention, particularly water level monitoring technical field.
Background technology
Acoustics, electricity and mechanics principle have mainly been used in existing water level monitoring technological invention, can obtain higher measuring accuracy, but equipment is comparatively complicated.Wherein, the ultrasonic water level monitoring has utilized hyperacoustic reflection, and receiving end receives the hyperacoustic time delay that reflects from transmitting terminal emission back through measuring ultrasound wave, can calculate the distance of measuring equipment to the water surface.The electricity water level monitoring uses electrode also can record water level, utilization be the electric conductivity of water.In addition, the mechanics water level monitoring utilizes buoyancy of water and pressure also can realize water level detecting.There is following shortcoming in existing technical scheme: measuring equipment is installed complicated, and plant maintenance is inconvenient, is applied to the water level monitoring of water field of big area usually, and installing and using under small size waters that disperses and shallow-water environment receives certain restriction.
Summary of the invention
The objective of the invention is complicated deficiency to be installed, proposed to use the water level monitoring method of radio-frequency communication method in order to overcome existing water level monitoring technical equipment.
Technical scheme of the present invention is: use the water level monitoring method of radio-frequency communication method, comprise the steps:
Step 1: data processing terminal connects radio frequency reader, gets nowhere if connect, and then connects radio frequency reader behind the checkout facility again, if successful connection then gets into next step;
Step 2: data processing terminal sends the read operation steering order to radio frequency reader;
Step 3: radio frequency reader is read radio electronic label and is passed to data processing terminal to the data of reading;
Step 4: the data that data processing terminal is passed back according to radio frequency reader go out the installation site information of relevant with it radio electronic label in conjunction with the comparison database lookup that in the radio electronic label data writing process, produces and store into data processing terminal before this;
Step 5: data processing terminal will compare with positional information radio electronic label that do not read according to same water level detecting place is that read, through calculating current water level scope of living in.
The beneficial effect of type of the present invention is: 1. simplified apparatus is installed: owing to used the radio-frequency communication technology; Carry out communication through wireless mode between radio electronic label and the radio frequency reader; Need not set up the communications cable; Only need radio electronic label be fixed on the corresponding waterline, select the installation site and the mounting means of radio frequency reader and data processing terminal according to site environment flexibly.2. the convenient multiple spot water level monitoring of realizing: radio frequency reader can be discerned the radio electronic label in the certain area coverage, and the cost control of radio electronic label is lower than radio frequency reader and the little light weight of volume.The quantity of designated water level monitoring point flexibly in the radio frequency reader identification range, and can obviously not increase equipment cost.
Description of drawings
Fig. 1 is the mounting structure synoptic diagram of monitoring system of the present invention.
Fig. 2 is the structural principle synoptic diagram of monitoring system of the present invention.
Fig. 3 is the main flow chart of monitoring method of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is described further.
Before scheme of the present invention is explained; Be necessary to introduce the technical know-how principle of scheme of the present invention institute foundation: the specific inductive capacity of water is very high; Much larger than the specific inductive capacity of air, the rate of decay of electromagnetic wave in water is also far above the aerial rate of decay, for the radiofrequency signal of a plurality of frequency ranges such as high frequency, ultrahigh frequency and microwave frequency band; Frequency is high more, and the rate of decay in water is also fast more.Utilize radiofrequency signal in water energy attenuation obviously than the influence of characteristics fast in the air and water to the antenna radio frequency parameter; Influenced by the electric parameter of water, when antenna from away from the water surface near the water surface, progressively be immersed in water again; Again in the process of progressively sinking; Medium around the antenna gradually becomes water by air, and parameters such as the gain of antenna all significant change can take place, thereby the transmitting-receiving of radiofrequency signal is impacted.In addition, electromagnetic wave has only part energy can be delivered in the water during from the air directive water surface, and its complementary energy can be reflected back toward in the air; Equally, when electromagnetic wave during the directive water surface, has only part energy can be delivered in the air from water, its complementary energy can be reflected in the backwater.Be ready to keep each other two equipment (life is one number service news equipment and No. two communication apparatus respectively) of radio frequency normal communication.Wherein, No. one radio-frequency communication equipment is placed in the air ambient, is fixed on more than the water surface after No. two radio-frequency communication equipment are done water-proofing treatment, progressively promotes water level then, and No. two radio-frequency communication equipment is dipped in the water gradually, and arrives the darker degree of depth under water.In whole process; Radio-frequency communication equipment and No. two radio-frequency communication equipment are under the constant situation of emission of radio frequency signals power; Along with the increase of the depth of water of living in position, the energy attenuation of radiofrequency signal in water is also many more, and the antenna index also is affected; The radio frequency energy that the other side sent that causes two radio-frequency communication equipment to receive reduces fast, and communication will be cut off when the radio frequency energy that receives is lower than certain value.Utilize this characteristic; Can ready a plurality of identical radio-frequency communication equipment be installed to same place as radio electronic label but on the position of differing heights; And keep certain spacing each other; At radio electronic label stored installation site separately and other useful informations, wherein a part of radio electronic label is more than the water surface simultaneously, and another part radio electronic label is below the water surface.When another radio-frequency communication equipment of use carries out radio-frequency communication with each radio electronic label successively as radio frequency reader; Can set up communication and obtain stored valid data on the corresponding radio electronic label with the part radio electronic label; But it is low more that the radio electronic label in the dark more position of the depth of water can be delivered to the energy of radio frequency reader, and change obviously; In addition; The part radio electronic label is because water level depth of living in surpasses threshold value; Cause radio electronic label can't from neighbourhood noise, identify the signal that radio frequency reader is sent, perhaps radio frequency reader can't identify the signal that radio electronic label sends, and causing can't communication.In the radio-frequency communication process between radio frequency reader and the radio electronic label; Radio frequency reader has or not and recognizes corresponding radio electronic label; And the data content of self storing of the radio electronic label that recognizes transmission; And the difference from the radio frequency energy intensity of different radio frequency electronic tag that receives of radio frequency reader, combine background database manager again, can draw current level measuring value through data comparison and corresponding algorithm.Use specific radio-frequency communication scheme, can realize 1 km and even multiple spot water level detecting in larger scope.
As illustrated in fig. 1 and 2; The water level monitoring system of use radio-frequency communication method of the present invention; Comprise at least two group radio electronic labels, in order to radio electronic label attachment, radio frequency reader and the data processing terminal of radio electronic label to be installed; It is characterized in that; Said radio electronic label attachment is perpendicular to the water surface; Said radio electronic label is clocklike arranged on perpendicular to the direction of water level, and wherein at least one group of label is positioned at below the water surface, and said radio frequency reader is installed in the interior radio-frequency communication in order to maintenance radio frequency reader and radio electronic label of effective identification range of radio electronic label; Said data processing terminal comprises that at least program controling module, data memory module and communication interface modules are in order to realize calculating and memory function; Said communication interface stores the installation site information of radio electronic label in the water level monitoring environment at least in order to connect radio frequency reader and data processing terminal in order to realize both data communication in the said data memory module, said program controling module has at least can be with the positional information of monitoring in real time and be built in the algorithm routine that the positional information in the data memory module compares in advance.
Further; In order to judge the position of radio electronic label more accurately; In said data memory module, also store the signal strength information of radio electronic label in the water level monitoring environment; Corresponding, said program controling module also have can with real-time monitored signal strength information be built in the algorithm routine that the signal strength information in the data memory module compares in advance.
Detailed explanation is done in technology and the functional requirement of facing the radio electronic label of water level monitoring system of the present invention down:
Above-mentioned radio electronic label can send to radio frequency reader with the data of its storage through the radio-frequency communication mode; Radio electronic label is a radio-frequency communication equipment; It also is non-volatile data storage medium; The Data Source of storing in the radio electronic label can be a radio frequency reader, and data send to radio electronic label by radio frequency reader through the radio-frequency communication mode, and radio electronic label carries out data storage after receiving valid data again; Also can in the production run of radio electronic label, distribute an exclusive numbering and one-time write in the storer of radio electronic label for each radio electronic label.The data items that radio electronic label writes can be provided with as required, but realizes function of the present invention in order to cooperate, and the installation site information that should comprise radio electronic label at least is the installation site information of level height particularly.
In order to reach the purpose that radio electronic label is associated with its installation site information; If select the radio electronic label that does not possess the radio frequency receiving function for use, then need store this radio electronic label installation site and other useful datas separately into data processing terminal; If select the radio electronic label that possesses the radio frequency receiving function for use, can all store on the radio electronic label with data the installation site information of radio electronic label and other again; Also can partial data be stored on the radio electronic label, another part data storage is to data processing terminal.
Under different water level conditions, be installed in the locational radio electronic label of differing heights and possibly be in the air ambient, perhaps touched the water surface, also perhaps be positioned at the following certain depth of the water surface.Receive the influence of water to radio electronic label; It is also different in the radio frequency reader of differing heights position the data of radio electronic label to be read effect; Be embodied in decreasing of radiofrequency signal power that radio electronic label that radio frequency reader receives sends; When this power is lower than the radiofrequency signal lowest power that radio frequency reader can discern, radio frequency reader can't receive the data that radio electronic label sends through the radio-frequency communication mode.
The hardware of radio electronic label constitutes should comprise antenna, radiofrequency launcher, programming controller, data-carrier store, this five major part of power module at least, possesses the radio frequency receiving function if desired, then need increase radio frequency receiver; Active radio electronic label also need increase battery.
According to the difference of radio electronic label power supply mode, can be divided into passive, half active and active radio electronic label.The passive RF electronic tag does not need powered battery, and the required working power of passive RF electronic tag is actual to be that the radio frequency energy of being sent by radio frequency reader that receives is converted to.Half active or active super high frequency radio frequency identification label is influenced by battery life, and serviceable life is shorter than passive RF electronic tag usually.
According to different specific embodiments, radio electronic label can require to be designed to possess simultaneously radio frequency and receive and the radio frequency sending function, also can be to only require to possess the radio-frequency transmissions function.If do not possess the radio frequency receiving function, then radio electronic label needs initiatively outwards to send radiofrequency signal; If possess the radio frequency receiving function, then can select initiatively to send radiofrequency signal, also can select the passive radiofrequency signal of redispatching after effective radiofrequency signal that receives to respond as radio-frequency communication.
The quantity of above-mentioned radio electronic label can be selected in greater than 2 integer range as required, and the similar and sampled point of the quantity of radio electronic label has determined the precision of water level monitoring.
Radio electronic label among the present invention must possess water-proof function, can bear the immersion and the corrosion of water, and the processing scheme of waterproof is regarded as the problem that prior art can solve and needn't introduces in detail.
Do detailed explanation in the face of the technology and the functional requirement of the electronic tag attachment among the present invention down:
The radio electronic label attachment is used for fixing radio electronic label.But the radio electronic label attachment can be the gauge of the fixed RF electronic tag of customization, also can be to select the on-the-spot object that is fit to that exists as the radio electronic label attachment according to the site environment characteristics.The radio electronic label attachment should be selected not to be subject to external environment as far as possible and destroy and the not labile object in position.
The result of use of radio electronic label attachment can be judged through actual measurement, to prevent the radio electronic label attachment radio frequency electric label antenna is caused harmful effect, finally influences radio electronic label read-write effect.
Do detailed explanation in the face of the technology and the functional requirement of the reader among the present invention down:
Radio frequency reader is the equipment that can carry out radio-frequency communication with radio electronic label.Radio frequency reader can be obtained the storage data on the radio electronic label through the radio-frequency communication mode; Also can data be sent to radio electronic label, and the valid data of receiving are written to data-carrier store by radio electronic label through the radio-frequency communication mode.The hardware formation of radio frequency reader mainly comprises antenna, radio frequency receiver, radiofrequency launcher, programming controller, data-carrier store and power module etc.If the radio electronic label of selecting for use does not possess the radio frequency receiving function, then radio frequency reader can not need radiofrequency launcher.Communication between radio frequency reader and the radio electronic label need be selected corresponding radio-frequency communication mode and communications protocol.
Radio frequency reader can send to data processing terminal from the valid data that radio electronic label gets access to, and radio frequency reader also can be obtained the valid data that need send to radio electronic label from data processing terminal.
Do detailed explanation in the face of the technology and the functional requirement of the data processing terminal among the present invention down:
Data processing terminal is a nucleus equipment of being responsible for data storage and processing in the whole water level monitoring system, and control and communication interface to radio frequency reader are provided, and can carry out mode of operation control to radio frequency reader, and carry out exchanges data with radio frequency reader.According to actual requirement of engineering; Data processing terminal can select for use flexibly with personal computer, industrial control computer, Programmable Logic Controller or based on the embedded system of single-chip microcomputer, ARM microcontroller etc. etc. as the hardware development platform, realize the function of data processing terminal again through algorithm routine.
The data content that need be written to radio electronic label is produced and is preserved by data processing terminal, and data content is relevant with states such as the residing water level monitoring point of radio electronic label, elevational position of living in or relative heights.After radio electronic label writes the data generation; Send to radio frequency reader by data processing terminal; Radio frequency reader sends to corresponding radio electronic label through the radio-frequency communication mode with data again, and by radio electronic label with corresponding data storage in the data-carrier store of himself.After radio frequency reader was carried out data read operation to radio electronic label, the data that successfully read sent to data processing terminal.Data processing terminal according to before be written to radio electronic label data and the actual radio electronic label data content of reading and radio frequency receiving signal strength information compare and analyze afterwards being installed in whether the locational radio electronic label of concrete water level monitoring point place's differing heights is not had by water logging and situation such as depth of immersion is made judgement, and export final level measuring result.
In order to have the basis of comparison; Must be in advance at the inner comparison database that comprises installation site information and/or signal strength information of setting up of data processing terminal; The foundation of this comparison database is based on a kind of actual measurement and statistic processes; For example, under water-less environment, install the water level monitoring system that comprises radio electronic label, radio electronic label attachment, radio frequency reader and data processing terminal according to the actual installation position, this moment, the installation site information and/or the signal strength information of radio electronic label can be surveyed acquisition; After above-mentioned installation site information and/or signal strength information added up input, just can set up the comparison database of various prescribed forms.Keeping under the constant situation of above-mentioned each parts relative position; Water level monitoring system is placed under the water environment, the judgement that read situation through radio frequency reader to radio electronic label this moment, and the information that will read compares with the comparison database; The radio electronic label that can judge which position is in below the water surface; The radio electronic label of which position is in more than the water surface, thereby can confirm the height of water level, according to the precision that density decides water level monitoring that is provided with of radio electronic label.Therefore the process of setting up of comparison database is easy to realize, this process is regarded as prior art and fully discloses, so introduce no longer in detail.
After having set up the water level monitoring system of above-mentioned use radio-frequency communication method; Just can adopt a kind of new method flexibly the water level under the various environment to be monitored, through two various embodiment the water level monitoring method of using the radio-frequency communication method is described below.
Embodiment 1: the principle of present embodiment through the radio electronic label that can read judge corresponding radio electronic label with the position of water surface relation, calculate current water level in conjunction with the installation site information of each radio electronic label.
According to the water level monitoring field condition; The radio electronic label total quantity that need is installed in this water level monitoring point place is confirmed as K; K is the natural number more than or equal to 2, and their spacing is equated and is D, and D is any number greater than the length of radio electronic label own; The sea level elevation of highly the highest radio electronic label is H; After confirming to need well the concrete installation site information of radio electronic label is installed, data processing terminal is each radio electronic label distribute data, and sends the data to each radio electronic label by radio frequency reader; Radio electronic label is received after the data data storage in data-carrier store, thereby simultaneously the installation site information stores of each radio electronic label is set up the comparison database to data processing terminal.For example; The digital data processing terminal is produced an array; Be that DATA (1), DATA (2), DATA (3) are up to DATA (K); And data are written to the 1st, the 2nd, the 3rd successively up to K radio electronic label, and the individual radio electronic label of n (n is a value among the K) is installed to the position that the corresponding sea level elevation in water level monitoring point place is H-(n-1) * D, simultaneously that the installation site of radio electronic label is corresponding sea level elevation data are saved in data processing terminal.Fixed a radio frequency reader then on outside certain distance certain fixed position; Suppose that this radio frequency reader is far away apart from radio electronic label; So radio electronic label can ignore to the distance difference of radio frequency reader, establishing radio electronic label is R to the distance of radio frequency reader.Suppose that each radio electronic label is parallel installation, the antenna of all radio electronic labels all is identical in the antenna gain towards the radio frequency reader direction.In addition, the emissive power of radio frequency reader and radio electronic label all keeps fixing.Under above assumed condition, the differentiation of radio-frequency communication quality is very little between radio electronic label and the radio frequency reader, and SEA LEVEL VARIATION becomes the principal element that influences the actual read-write of each radio electronic label effect.In certain moment in the water level monitoring process, radio frequency reader has been carried out data read operation to all radio electronic labels, reads the valid data that the individual radio electronic label of M (0 < M < K) sends altogether, and valid data comprise that DATA (1), DATA (2) are up to DATA (M).Radio frequency reader sends to data processing terminal with these data; Data processing terminal is according to these data; Through searching the installation site information database of each radio electronic label of self storing, lookup result shows that the pairing installation site of the radio electronic label of reading scope is (M-1) * D from the H sea level elevation to H-again.If install and use under the condition at this equipment; Radio electronic label is responsive to water electrode; In a single day radio electronic label contacts the water surface and just can't be read by radio frequency reader, and can to calculate current waterline scope of living in be that H-(M-1) * D is between the H-M*D to data processing terminal so.If radio electronic label installs and uses under the condition at this equipment, just can't be read after need arriving under water below the degree of depth L by radio frequency reader, waterline scope of living in then is that H-(M-1) * D+L is to H-M*D+L so.According to above result,, need reduce space D if need obtain current more accurately water level scope of living in.But in the practical application, the selection of space D will combine radio electronic label and other combined factors to consider that necessity is to need verification experimental verification.
In the present embodiment; The setting of space D is not necessarily identical; In the comparison database of data processing terminal, have respective value just passable as long as guarantee the installation site information of each radio electronic label, the space D of adjacent radio electronic label is set to equate just installation and the computing in order to simplify monitoring system.
The method that present embodiment is described is practical, has obtained checking through experiment.Specifically select for use field of radio frequency identification super high frequency radio frequency identification reader commonly used as radio frequency reader, use super high frequency radio frequency identification label as radio electronic label.
Embodiment 2: the principle of present embodiment judges that through the variation of the radio frequency energy intensity that the radio electronic label that detects radio frequency reader and receive sends the corresponding radio electronic label institute and the position of the water surface concern, calculate current water level in conjunction with the installation site information of each radio electronic label.
Under the fixing situation of radio frequency reader and radio electronic label duty and position relation, the variation principal element of the radio frequency energy intensity of the radio electronic label that radio frequency reader is received is the degree of depth situation that radio electronic label is not had by water logging.When radio electronic label during away from the water surface; It is constant basically that radio frequency reader detects the radio frequency energy intensity of this radio electronic label; This radio frequency energy intensity can obviously descend when RF tag touches the water surface, and the increase radio frequency energy intensity of the degree of depth that is not had by water logging along with radio electronic label then continues to reduce.Equally, the radio frequency energy Strength Changes of the received radio frequency reader of radio electronic label also mainly receives the influence of SEA LEVEL VARIATION.
Radio frequency reader must possess radio frequency energy intensity detection function in the present embodiment.
Confirm that according to specific requirements such as the field condition of water level detecting point and level measuring scopes the installation quantity of radio electronic label is K; And the spacing that on the direction perpendicular to surface level, makes them equates and is D that the sea level elevation of highly the highest radio electronic label is H.After confirming to need well the particular location of radio electronic label is installed; Data processing terminal is each radio electronic label distribute data; And send the data to each radio electronic label by radio frequency reader; Radio electronic label receives after the data that with data storage the installation position data with each radio electronic label stores data processing terminal into simultaneously in data-carrier store.For example; The digital data processing terminal is produced an array; Be that DATA (1), DATA (2), DATA (3) are up to DATA (K); And data are written to the 1st, the 2nd, the 3rd successively up to K radio electronic label, and n radio electronic label is installed to the position that the corresponding sea level elevation in water level monitoring point place is H-(n-1) * D, simultaneously that the installation site of radio electronic label is corresponding sea level elevation data are saved in data processing terminal.Disturb in order to avoid the radiofrequency signal between the radio electronic label as far as possible; Can adopt the radio electronic label of inquiry to read mode; Promptly at first send request instruction to the radio electronic label of appointment by radio frequency reader; Radio electronic label sends the radio-frequency communication signal to radio frequency reader after receiving request instruction again, and radio electronic label does not initiatively send radiofrequency signal under other situation.According to this working method; Radio frequency reader is inquired about all radio electronic labels of installing; Read the individual radio electronic label of M (0 < M < K) altogether; Corresponding data content be respectively DATA (1), DATA (2) up to DATA (M), and corresponding radio frequency energy intensity data is respectively that RSSI (1), RSSI (2) are up to RSSI (M).If install and use under the condition at this equipment, under the situation that radio electronic label is not had by water logging, the radio frequency energy strength difference of each radio electronic label that radio frequency reader is received is minimum, and radio frequency energy intensity is RSSI0.Data processing terminal deducts RSSI0 with RSSI (1), RSSI (2) up to RSSI (M) and obtains corresponding difference Delta (1), Delta (2) up to Delta (M), i.e. Delta (n)=RSSI (n)-RSSI0.The radio frequency energy intensity data corresponding radio electronic label of this difference less than threshold value J (J as required artificially set) is judged to be more than the water surface, is judged to be below the water surface greater than the corresponding radio electronic label of radio frequency energy intensity data of threshold value J.If calculate according to difference, there be P radio electronic label to be judged as and be under water, they distinguish corresponding M, M-1 up to M-P-1 radio electronic label.Then data processing terminal can be judged according to the installation site information of each radio electronic label of storing before again; Current waterline is higher than M-P-1 the residing sea level elevation of radio electronic label; Be H-(M-P) * D; Simultaneously less than M-P-2 the residing sea level elevation of radio electronic label, i.e. H-(M-P-1) * D.The measuring accuracy of further flooding if desired; Perhaps reduce the installation quantity of radio electronic label; Can be with Theoretical Calculation and experiment test to combination; Set up radio electronic label radio frequency energy strength retrogression and change and the data look-up table that is not had depth relationship by water logging, can in look-up table, find the corresponding depth of immersion that is not had by water logging, combine the installation site of this radio electronic label to calculate current water level again according to measured data.
For example the value under the state that radio frequency energy strength ratio that radio frequency reader receives certain radio electronic label is not had by water logging in air has reduced 25dB; In the comparison database of data processing terminal, searching the corresponding degree of depth that is not had by water logging of 25dB is 15 centimetres; And the residing installation site of this radio electronic label of in data processing terminal, storing is 200 meters of height above sea level; Then water level is 200 meters and deducts 15 centimetres, is 199.85 meters of height above sea level.Present embodiment is formally feasible through experimental verification through the frequency range of 2.4GHz.
It is a kind of special circumstances of zero that the foregoing description 1 can be regarded as among the embodiment 2 as threshold value J.
Through the foregoing description 1 is carried out upper summary with embodiment 2, as shown in Figure 3, we can obtain the water level monitoring method of general use radio-frequency communication method, comprise the steps:
Step 1: data processing terminal connects radio frequency reader, gets nowhere if connect, and then connects radio frequency reader behind the checkout facility again, if successful connection then gets into next step;
In this step, the mode that data processing terminal connects radio frequency reader can be wired or wireless connected mode, and concrete connecting interface includes but not limited to wired or wireless communication interface modules such as RS232/RS485/CAN/ bluetooth WIFI.
Step 2: data processing terminal sends the read operation steering order to radio frequency reader.
Step 3: radio frequency reader is read radio electronic label and is passed to data processing terminal to the data of reading.
Step 4: the data that data processing terminal is passed back according to radio frequency reader go out the installation site information of relevant with it radio electronic label in conjunction with the comparison database lookup that in the radio electronic label data writing process, produces and store into data processing terminal before this.
The process of setting up of the comparison database of this step is aforementioned to be described in detail, and the data that radio frequency reader is passed back also are known technologies in the data processing with the algorithm routine that the comparison database is searched comparison, therefore needn't describe in detail.
Step 5: data processing terminal will compare with positional information radio electronic label that do not read according to same water level detecting place is that read, through calculating current water level scope of living in.
As long as we can know the two place's radio electronic labels that can confirm that threshold value J is adjacent through embodiment 1 and embodiment 2; Can confirm the numerical value of the water surface between this adjacent radio electronic label, through changing radio electronic label in the judgement precision that can change this method perpendicular to the arranging density on the water level direction (being similar to sampling frequency).The implication of the radio electronic label of reading in this step He do not read is: whether be below or above preset threshold J, when being higher than threshold value J, be regarded as not reading, when being lower than threshold value J, be regarded as reading, under the perfect condition, threshold value J equals zero.
Adopt water level monitoring system of the present invention and engineering method, when carrying out engineering construction, should be noted that and implement according to following link:
One, prospecting site environment, that confirms that the quantity in water level detecting place, initial option goes out several suitable radio frequency reader sets up place, initial option radio electronic label attachment.
Two, set up a little according to radio frequency reader and the radio electronic label attachment between distance confirm the reading/writing distance index request between radio frequency reader and the radio electronic label.
Three, confirm the installation quantity of radio electronic label and the mounting distance between the radio electronic label according to level measuring precision and level measuring area requirement.The level measuring precision is high more, and then mounting distance is near more, otherwise far away more; The level measuring scope is big more, and installation quantity is many more, otherwise installation quantity is few more.But need combine engineering actual simultaneously, mounting distance is crossed between the close-range shot band electronic label and can be interacted, and finally reduces the radio-frequency communication quality between radio frequency reader and the radio electronic label.
Four,, confirm the product type of radio frequency reader and radio electronic label, comprising definite antenna model according to the result of above step.Wherein, Selecting more, the antenna of high-gain can improve the reading/writing distance between radio frequency reader and the radio electronic label; But the raising of antenna gain can influence antenna beamwidth; Thereby the regional extent of radio electronic label can be effectively read in influence, so need summation to consider the suitable antenna of back selection.
Five, at the scene under the environment, radio frequency reader and radio electronic label are carried out the basic test of read-write capability.If do not reach the read-write effect of expection, need the infield and the mounting means of adjustment radio frequency reader and radio electronic label, up to meeting the demands.
Six, connect data processing terminal and radio frequency reader, radio electronic label is carried out data write operation.Data processing terminal generates data according to initial conditions such as water level detecting ground number of spots, level measuring scope, level measuring precision and this label height and positions of living in, and passes to radio frequency reader, finally writes data into corresponding radio electronic label.After data write successfully all radio electronic labels are installed to waterline position corresponding on the corresponding radio electronic label attachment.
Seven, accomplish the last installation of radio frequency reader and data processing terminal.
Eight, total system is carried out final water level detecting functional check, the water level detecting system can formally use after accomplishing.
Those of ordinary skill in the art will appreciate that embodiment described here is in order to help reader understanding's principle of the present invention, should to be understood that protection scope of the present invention is not limited to such special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combinations that do not break away from essence of the present invention according to these teachings disclosed by the invention, and these distortion and combination are still in protection scope of the present invention.
Claims (2)
1. use the water level monitoring method of radio-frequency communication method, it is characterized in that, comprise the steps:
Step 1: data processing terminal connects radio frequency reader, gets nowhere if connect, and then connects radio frequency reader behind the checkout facility again, if successful connection then gets into next step;
Step 2: data processing terminal sends the read operation steering order to radio frequency reader;
Step 3: radio frequency reader is read radio electronic label and is passed to data processing terminal to the data of reading;
Step 4: the data that data processing terminal is passed back according to radio frequency reader go out the installation site information of relevant with it radio electronic label in conjunction with the comparison database lookup that in the radio electronic label data writing process, produces and store into data processing terminal before this;
Step 5: data processing terminal will compare with positional information radio electronic label that do not read according to same water level detecting place is that read, through calculating current water level scope of living in.
2. the water level monitoring method of use radio-frequency communication method according to claim 1; It is characterized in that; At least the installation site information that comprises radio electronic label in the data of each radio electronic label that radio frequency reader is read in the said step 3, said program controling module have at least can with the positional information of monitoring in real time be built in the algorithm routine that the positional information in the data memory module compares in advance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210246464.1A CN102759390B (en) | 2012-07-17 | 2012-07-17 | Water level monitoring method by radio frequency communication method |
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| CN201210246464.1A CN102759390B (en) | 2012-07-17 | 2012-07-17 | Water level monitoring method by radio frequency communication method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106934432A (en) * | 2017-03-14 | 2017-07-07 | 江苏本能科技有限公司 | Parking lot vehicle early warning method and system |
| CN108972535A (en) * | 2017-05-31 | 2018-12-11 | 北京小米移动软件有限公司 | Autonomous system, autonomous mobile apparatus and virtual wall component |
| CN110569934A (en) * | 2019-09-03 | 2019-12-13 | 菱电电梯有限公司 | Elevator pit water inflow monitoring method |
| CN113686410A (en) * | 2021-08-16 | 2021-11-23 | 合肥联睿微电子科技有限公司 | Bluetooth bathymetric survey equipment |
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| US7107836B2 (en) * | 2003-12-19 | 2006-09-19 | Neopost Industrie Sa | Radio frequency tagging for indicia printing and product information |
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| WO2004049237A2 (en) * | 2002-11-21 | 2004-06-10 | S. C. Johnson & Son, Inc. | Products having rfid tags for wireless interrogation |
| US7107836B2 (en) * | 2003-12-19 | 2006-09-19 | Neopost Industrie Sa | Radio frequency tagging for indicia printing and product information |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106934432A (en) * | 2017-03-14 | 2017-07-07 | 江苏本能科技有限公司 | Parking lot vehicle early warning method and system |
| CN106934432B (en) * | 2017-03-14 | 2021-02-05 | 江苏本能科技有限公司 | Vehicle early warning method and system for parking lot |
| CN108972535A (en) * | 2017-05-31 | 2018-12-11 | 北京小米移动软件有限公司 | Autonomous system, autonomous mobile apparatus and virtual wall component |
| CN110569934A (en) * | 2019-09-03 | 2019-12-13 | 菱电电梯有限公司 | Elevator pit water inflow monitoring method |
| CN113686410A (en) * | 2021-08-16 | 2021-11-23 | 合肥联睿微电子科技有限公司 | Bluetooth bathymetric survey equipment |
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| CN102759390B (en) | 2015-02-25 |
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