CN202648743U - Water level monitoring system using radio-frequency communication method - Google Patents
Water level monitoring system using radio-frequency communication method Download PDFInfo
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- CN202648743U CN202648743U CN 201220344917 CN201220344917U CN202648743U CN 202648743 U CN202648743 U CN 202648743U CN 201220344917 CN201220344917 CN 201220344917 CN 201220344917 U CN201220344917 U CN 201220344917U CN 202648743 U CN202648743 U CN 202648743U
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Abstract
The utility model relates to a water level monitoring system using a radio-frequency communication method. The water level monitoring system comprises at least two sets of radio-frequency electronic labels, radio-frequency electronic label attachments for mounting the radio-frequency electronic labels, a radio-frequency reader and a data processing terminal and is characterized in that the radio-frequency electronic label attachments are vertical to the water surface, the radio-frequency electronic labels are regularly arranged in a direction vertical to the water level, wherein at least one set of labels is positioned under the water surface, the radio-frequency reader is arranged in an effective identification range of the radio-frequency electronic labels and used for keeping radio-frequency communication between the radio-frequency reader and the radio-frequency electronic labels, and the data processing terminal at least comprises a program control module, a data storage module and a communication interface module and used for realizing computing and storing functions. The water level monitoring system disclosed by the utility model has the beneficial effects of simplifying the equipment installation and conveniently realizing multipoint water-level monitoring.
Description
Technical field
The utility model monitoring technical field, particularly water level monitoring technical field.
Background technology
Existing water level monitoring technical application Novel main will have been used acoustics, electricity and mechanics principle, can obtain higher measuring accuracy, but equipment is comparatively complicated.Wherein, the ultrasonic water level monitoring has utilized hyperacoustic reflection, receives the hyperacoustic time delay that reflects by measuring ultrasound wave from the rear receiving end of transmitting terminal emission, can calculate measuring equipment to the distance of 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, usually is applied to the water level monitoring of water field of big area, and installing and using under the small size waters that disperses and shallow-water environment is subject to certain restrictions.
The utility model content
The purpose of this utility model is in order to overcome existing water level monitoring technical equipment complicated deficiency to be installed, and has proposed to use the water level monitoring system of frequency communication method.
The technical solution of the utility model is: the water level monitoring system that uses frequency communication method, comprise at least two group radio electronic labels, in order to the radio electronic label attachment of radio electronic label to be installed, radio frequency reader and data processing terminal, it is characterized in that, described radio electronic label attachment is perpendicular to the water surface, described radio electronic label is regular arrangement on the direction perpendicular to water level, wherein at least one group of label is positioned at below the water surface, described radio frequency reader is installed in effective identification range of radio electronic label in order to keep the radio-frequency communication of radio frequency reader and radio electronic label, described data processing terminal comprises program controling module at least, data memory module and communication interface modules are in order to realize calculating and memory function, described communication interface is in order to connect radio frequency reader and data processing terminal in order to realize both data communication, at least store the installation site information of radio electronic label in the water level monitoring environment in the described data memory module, described program controling module have at least can with the positional information of Real-Time Monitoring be built in advance the algorithm routine that the positional information in the data memory module compares.
The beneficial effect of the utility model type is: 1. simplified apparatus is installed: owing to having used the radio-frequency communication technology, carry out communication by wireless mode between radio electronic label and the radio frequency reader, do not need to set up the communications cable, only radio electronic label need to be fixed on the corresponding waterline, according to installation site and the mounting means of site environment flexible choice radio frequency reader and data processing terminal.2. the convenient multi-point water level of realizing is monitored: radio frequency reader can be identified 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 quality of volume is light.The flexible quantity of designated water level monitoring point in the radio frequency reader identification range, and can obviously not increase equipment cost.
Description of drawings
Fig. 1 is the mounting structure schematic diagram of monitoring system of the present utility model.
Fig. 2 is the structural principle schematic diagram of monitoring system of the present utility model.
Fig. 3 is the main flow chart of monitoring method of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Before scheme of the present utility model is explained, be necessary to introduce the technical know-how principle of scheme of the present utility model institute foundation: the specific inductive capacity of water is very high, specific inductive capacity much larger than air, the rate of decay of electromagnetic wave in water is also far above the aerial rate of decay, radiofrequency signal for a plurality of frequency ranges such as high frequency, ultrahigh frequency and microwave frequency bands, frequency is higher, and the rate of decay in water is also faster.Utilize radiofrequency signal in water energy attenuation obviously than the impact on the antenna radio frequency parameter of characteristics fast in the air and water, affected 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 the parameters such as the gain of antenna all significant change can occur, thereby the transmitting-receiving of radiofrequency signal is impacted.In addition, electromagnetic wave only has 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, only has 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, then progressively promotes water level, 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, a radio-frequency communication equipment and No. two radio-frequency communication equipment are in the situation that emission of radio frequency signals power is constant, increase along with the depth of water of living in position, the energy attenuation of radiofrequency signal in water is also more, the antenna index also is affected, the radio frequency energy fast reducing that the other side who causes two radio-frequency communication equipment to receive sends, communication will be cut off when the radio frequency energy that receives is lower than certain value.Utilize this characteristic, ready a plurality of identical radio-frequency communication equipment can be installed to same place as radio electronic label but on the position of differing heights, and keep each other certain spacing, in radio electronic label, store simultaneously separately installation site and other useful informations, wherein a part of radio electronic label is more than the water surface, 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 the valid data of storing on the corresponding radio electronic label with the part radio electronic label, but it is lower that the radio electronic label in the darker 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 identify the signal that radio frequency reader sends from neighbourhood noise, perhaps the radio frequency reader None-identified goes out 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, in conjunction with background database manager, can draw current level measuring value by comparing and corresponding algorithm again.Use specific radio-frequency communication scheme, can realize that 1 km and even multi-point water level in larger scope detect.
As illustrated in fig. 1 and 2, the water level monitoring system of use frequency communication method described in the utility model, comprise at least two group radio electronic labels, in order to the radio electronic label attachment of radio electronic label to be installed, radio frequency reader and data processing terminal, it is characterized in that, described radio electronic label attachment is perpendicular to the water surface, described radio electronic label is regular arrangement on the direction perpendicular to water level, wherein at least one group of label is positioned at below the water surface, described radio frequency reader is installed in effective identification range of radio electronic label in order to keep the radio-frequency communication of radio frequency reader and radio electronic label, described data processing terminal comprises program controling module at least, data memory module and communication interface modules are in order to realize calculating and memory function, described communication interface is in order to connect radio frequency reader and data processing terminal in order to realize both data communication, at least store the installation site information of radio electronic label in the water level monitoring environment in the described data memory module, described program controling module have at least can with the positional information of Real-Time Monitoring be built in advance the algorithm routine that the positional information in the data memory module compares.
Further, in order to judge more accurately the position of radio electronic label, in described data memory module, also store the signal strength information of radio electronic label in the water level monitoring environment, corresponding, described program controling module also have can with the signal strength information of Real-Time Monitoring be built in advance the algorithm routine that the signal strength information in the data memory module compares.
The below is described in detail technology and the functional requirement of the radio electronic label of water level monitoring system of the present utility model:
Above-mentioned radio electronic label can send to radio frequency reader with the data of its storage by the radio-frequency communication mode, radio electronic label is radio-frequency communication equipment, it also is non-volatile data storage medium, the Data Source of storing in the radio electronic label can be radio frequency reader, data send to radio electronic label by radio frequency reader by the radio-frequency communication mode, and radio electronic label carries out the 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 arrange as required, but realizes function of the present utility model in order to cooperate, and the installation site information that should comprise at least radio electronic label 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 reception function, then need this radio electronic label installation site and other useful datas separately stored into data processing terminal; If select the radio electronic label that possesses the radio frequency reception function, can all store on the radio electronic label with data the installation site information of radio electronic label and other again; Also partial data can be stored on the radio electronic label, another part data store on the data processing terminal.
Under different water level conditions, be installed in the locational radio electronic label of differing heights and may be in the air ambient, perhaps touched the water surface, also or be positioned at the following certain depth of the water surface.Be subject to water to the impact of radio electronic label, in the radio frequency reader of differing heights position the data of radio electronic label are read effect also different, 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 identify, radio frequency reader can't receive the data that radio electronic label sends by the radio-frequency communication mode.
The hardware of radio electronic label consists of should comprise antenna, radiofrequency launcher, programming controller, data-carrier store, this five major part of power module at least, if need to possess the radio frequency reception function, then need increase radio frequency receiver; Active radio electronic label also needs to 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 that is sent by radio frequency reader that will receive is converted to.Half active or active super high frequency radio frequency identification label is affected by battery life, and serviceable life is usually short than passive RF electronic tag.
According to different specific embodiments, radio electronic label can require to be designed to possess simultaneously radio frequency reception and radio frequency sending function, also can be to only require to possess the radio-frequency transmissions function.If do not possess the radio frequency reception function, then radio electronic label needs initiatively outwards to send radiofrequency signal; If possess the radio frequency reception function, then can select initiatively to send radiofrequency signal, also can select passive receiving to send again radiofrequency signal after effective radiofrequency signal and 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 in the utility model must possess water-proof function, can bear 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.
The below is described in detail technology and the functional requirement of the electronic tag attachment in the utility model:
The radio electronic label attachment is used for the fixed RF electronic tag.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 by actual measurement, to prevent the radio electronic label attachment radio frequency electric label antenna is caused harmful effect, finally affects radio electronic label read-write effect.
The below is described in detail technology and the functional requirement of the reader in the utility model:
Radio frequency reader is the equipment that can carry out with radio electronic label radio-frequency communication.Radio frequency reader can be obtained storage data on the radio electronic label by the radio-frequency communication mode; Also can data be sent to radio electronic label by the radio-frequency communication mode, and by radio electronic label the valid data of receiving are written to data-carrier store.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 does not possess the radio frequency reception function, then radio frequency reader can not need radiofrequency launcher.Communication between radio frequency reader and the radio electronic label need to 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 to send to radio electronic label from data processing terminal.
The below is described in detail technology and the functional requirement of the data processing terminal in the utility model:
Data processing terminal is the nucleus equipment of being responsible for the 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 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 hardware development platform, realize again the function of data processing terminal by algorithm routine.
The data content that need to 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 the radio electronic label data writing produces, send to radio frequency reader by data processing terminal, radio frequency reader sends to corresponding radio electronic label by the radio-frequency communication mode with data again, and by radio electronic label corresponding data is stored 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 the data of radio electronic label and the actual radio electronic label data content of reading and radio frequency receiving signal strength information and compare and analyzes 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 the situation such as depth of immersion judges, 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, install under water-less environment according to the actual installation position and to comprise radio electronic label, the radio electronic label attachment, the water level monitoring system of radio frequency reader and data processing terminal, this moment, 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.In the situation that keep above-mentioned each parts relative position constant, water level monitoring system is placed under the water environment, the judgement that to radio electronic label read situation by radio frequency reader this moment, and with reading information with compare database and compare, 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 determine the height of water level, decides the precision of water level monitoring according to the density of setting 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, therefore introduce no longer in detail.
After having set up the water level monitoring system of above-mentioned use frequency communication method, just can adopt a kind of brand-new method flexibly the water level under the various environment to be monitored, the water level monitoring method of using frequency communication method is described below by two different embodiment.
Embodiment 1: the principle of the present embodiment by the radio electronic label that can read judge corresponding radio electronic label with the position relationship of the water surface, 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 defined as K, K is the natural number more than or equal to 2, and their spacing is equated and be D in the direction perpendicular to surface level, 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 determining the concrete installation site information that needs the installation radio electronic label, 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 stores data in the data-carrier store into after receiving data, sets up the comparison database thereby simultaneously the installation site information of each radio electronic label is stored into data processing terminal.For example, the data data processing terminal is produced an array, be that DATA (1), DATA (2), DATA (3) are until DATA (K), and data are written to the 1st, the 2nd, the 3rd successively until K radio electronic label, and being a value among the K with n(n) individual 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, and the sea level elevation data that the installation site of radio electronic label is corresponding are saved in data processing terminal simultaneously.Then the fixed position of certain outside certain distance has fixed a radio frequency reader, suppose that this radio frequency reader is far away apart from radio electronic label, therefore radio electronic label can be ignored 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 affects the actual read-write of each radio electronic label effect.In the water level monitoring process certain constantly, radio frequency reader has been carried out data read operation to all radio electronic labels, read altogether the valid data that the individual radio electronic label of M(0＜M＜K) sends, valid data comprise DATA (1), DATA (2) until DATA (M).Radio frequency reader sends to data processing terminal with these data, data processing terminal is according to these data, by searching the installation site information database of each radio electronic label of self storing, lookup result shows that the corresponding 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 is installed and used under the condition at this equipment, need to arrive under water degree of depth L and just can't be read by radio frequency reader after following, waterline scope of living in then is that H-(M-1) * D+L is to H-M*D+L so.According to above result, if need to obtain more accurately current water level scope of living in, need to reduce space D.But in the practical application, the selection of space D will be in conjunction with radio electronic label and the consideration of other combined factors, and necessity is to need verification experimental verification.
In the present embodiment, the setting of space D is not necessarily identical, have respective value just passable in the comparison database of data processing terminal 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 the present embodiment is described is practical, has obtained by experiment checking.Specifically select 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 position relationship of corresponding radio electronic label institute and the water surface is judged in the variation of the radio frequency energy intensity that the principle of the present embodiment sends by the radio electronic label that detects radio frequency reader and receive, and calculates current water level in conjunction with the installation site information of each radio electronic label.
In the situation that radio frequency reader and radio electronic label duty and position relationship are fixing, 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 substantially constant that radio frequency reader detects the radio frequency energy intensity of this radio electronic label, this radio frequency energy intensity can obviously descend when radio-frequency (RF) tag is touched the water surface, and the increase radio frequency energy intensity of the degree of depth that is not then had by water logging along with radio electronic label continues to reduce.Equally, the radio frequency energy Strength Changes of the received radio frequency reader of radio electronic label also mainly is subjected to the impact of SEA LEVEL VARIATION.
Radio frequency reader must possess radio frequency energy intensity detection function in the present embodiment.
Determine 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 their spacing is equated and be D in the direction perpendicular to surface level, the sea level elevation of highly the highest radio electronic label is H.After determining the particular location that needs the installation radio electronic label, 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 stores data in the data-carrier store into after receiving data, and the installation position data with each radio electronic label stores data processing terminal into simultaneously.For example, the data data processing terminal is produced an array, be that DATA (1), DATA (2), DATA (3) are until DATA (K), and data are written to the 1st, the 2nd, the 3rd successively until K radio electronic label, and n radio electronic label be installed to the position that the corresponding sea level elevation in water level monitoring point place is H-(n-1) * D, the sea level elevation data that the installation site of radio electronic label is corresponding are saved in data processing terminal simultaneously.Disturb in order to avoid the radiofrequency signal between the radio electronic label as far as possible, can adopt the radio electronic label reading manner of inquiry, namely 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 in other situations.According to this working method, radio frequency reader is inquired about all radio electronic labels of installing, read altogether M (the individual radio electronic label of 0＜M＜K), corresponding data content is respectively DATA (1), DATA (2) until DATA (M), and corresponding radio frequency energy intensity data is respectively that RSSI (1), RSSI (2) are until RSSI (M).If install and use under the condition at this equipment, in 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 obtains corresponding difference Delta (1), Delta (2) until Delta (M), i.e. Delta (n)=RSSI (n)-RSSI0 with RSSI (1), RSSI (2) until RSSI (M) deducts RSSI0.This difference is artificially set as required less than threshold value J(J) the corresponding radio electronic label of radio frequency energy intensity data be judged to be more than the water surface, be 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 until 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.If need to further flood measuring accuracy, perhaps reduce the installation quantity of radio electronic label, theory can be calculated and experiment test to combination, setting up radio electronic label radio frequency energy strength retrogression changes and the data look-up table that is not had depth relationship by water logging, can find the corresponding depth of immersion that is not had by water logging according to measured data in look-up table, the installation site in conjunction with this radio electronic label calculates current water level again.
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, searching the degree of depth that is not had by water logging corresponding to 25dB in the comparison database of data processing terminal is 15 centimetres, and the residing installation site of this radio electronic label of storing in data processing terminal 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.The present embodiment is verified formally feasible by the frequency range of 2.4GHz by experiment.
It is a kind of special circumstances of zero that above-described embodiment 1 can be regarded as among the embodiment 2 as threshold value J.
By above-described embodiment 1 and embodiment 2 are carried out upper summary, as shown in Figure 3, we can obtain the water level monitoring method of general use frequency communication method, comprise the steps:
Step 1: data processing terminal connects radio frequency reader, if connect unsuccessfully, then reconnects radio frequency reader behind the checkout facility, if successful connection then enters 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 the 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 the data of reading is passed to data processing terminal.
Step 4: the data that data processing terminal is passed back according to radio frequency reader go out the installation site information of associated radio electronic label in conjunction with the comparison database lookup that produces before this and store into data processing terminal in the radio electronic label data writing process.
The process of setting up of the comparison database of this step is aforementioned to be described in detail, the data that radio frequency reader is passed back with compare database and search the known technology that the algorithm routine of comparing also is Data processing, 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, by calculating current water level scope of living in.
By embodiment 1 and embodiment 2 we as long as can know can two adjacent place's radio electronic labels of definite threshold J, can determine the numerical value of the water surface between this adjacent radio electronic label, by 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 the threshold value J of setting, when being higher than threshold value J, be considered as not reading, when being lower than threshold value J, be considered as reading, under the perfect condition, threshold value J equals zero.
Adopt water level monitoring system of the present utility model and engineering method, when carrying out engineering construction, should be noted that according to following link and implement:
One, prospecting site environment, that determines 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 determine reading/writing distance index request between radio frequency reader and the radio electronic label.
Three, determine 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 higher, and then mounting distance is nearer, otherwise far away; The level measuring scope is larger, and installation quantity is more, otherwise installation quantity is fewer.But need simultaneously incorporation engineering actual, 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, according to the result of above step, determine the product type of radio frequency reader and radio electronic label, comprising definite antenna model.Wherein, select the antenna of high-gain more can improve reading/writing distance between radio frequency reader and the radio electronic label, but the raising of antenna gain can affect antenna beamwidth, thereby the regional extent of radio electronic label can be effectively read in impact, so select suitable antenna after needing summation to consider.
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 to adjust infield and the mounting means of radio frequency reader and radio electronic label, until meet the demands.
Six, connection data processing terminal and radio frequency reader are carried out data write operation to radio electronic label.Data processing terminal is according to initial conditions generated datas such as water level detecting place quantity, 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.Data write and successfully afterwards all radio electronic labels are installed to waterline position corresponding on the corresponding radio electronic label attachment.
Seven, finish the last installation of radio frequency reader and data processing terminal.
Eight, whole system is carried out final water level detecting functional check, water level detecting system can formally use after finishing.
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 utility model, should to be understood to that protection domain of the present utility model 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 the utility model essence according to disclosed these technology enlightenments of the utility model, and these distortion and combination are still in protection domain of the present utility model.
Claims (3)
1. use the water level monitoring system of frequency communication method, comprise at least two group radio electronic labels, in order to the radio electronic label attachment of radio electronic label to be installed, radio frequency reader and data processing terminal, it is characterized in that, described radio electronic label attachment is perpendicular to the water surface, described radio electronic label is regular arrangement on the direction perpendicular to water level, wherein at least one group of label is positioned at below the water surface, described radio frequency reader is installed in effective identification range of radio electronic label in order to keep the radio-frequency communication of radio frequency reader and radio electronic label, described data processing terminal comprises program controling module at least, data memory module and communication interface modules are in order to realize calculating and memory function, described communication interface is in order to connect radio frequency reader and data processing terminal in order to realize both data communication, at least store the installation site information of radio electronic label in the water level monitoring environment in the described data memory module, described program controling module have at least can with the positional information of Real-Time Monitoring be built in advance the algorithm routine that the positional information in the data memory module compares.
2. the water level monitoring system of use frequency communication method according to claim 1, in described data memory module, also store the signal strength information of radio electronic label in the water level monitoring environment, corresponding, described program controling module also have can with the signal strength information of Real-Time Monitoring be built in advance the algorithm routine that the signal strength information in the data memory module compares.
3. the water level monitoring system of use frequency communication method according to claim 1 is characterized in that, described radio electronic label must possess water-proof function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220344917 CN202648743U (en) | 2012-07-17 | 2012-07-17 | Water level monitoring system using radio-frequency communication method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201220344917 CN202648743U (en) | 2012-07-17 | 2012-07-17 | Water level monitoring system using radio-frequency communication method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768055A (en) * | 2012-07-17 | 2012-11-07 | 成都九洲电子信息系统股份有限公司 | Water level monitoring system using radio frequency communication method |
| CN109902776A (en) * | 2017-12-11 | 2019-06-18 | 航天信息股份有限公司 | A kind of temperature monitoring method and device |
| CN110907015A (en) * | 2019-08-30 | 2020-03-24 | 南京邮电大学 | Liquid level monitoring method based on RFID (radio frequency identification) in indoor environment |
| CN113570825A (en) * | 2021-08-12 | 2021-10-29 | 江苏奥斯拓体育科技有限公司 | Swimming pool drowning prevention early warning, positioning and lifesaving system based on Bluetooth technology |
| CN116539088A (en) * | 2023-05-05 | 2023-08-04 | 青岛海威茨仪表有限公司 | Bubble depth judgment model and method for instrument, detection system and method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768055A (en) * | 2012-07-17 | 2012-11-07 | 成都九洲电子信息系统股份有限公司 | Water level monitoring system using radio frequency communication method |
| CN102768055B (en) * | 2012-07-17 | 2014-07-09 | 成都九洲电子信息系统股份有限公司 | Water level monitoring system using radio frequency communication method |
| CN109902776A (en) * | 2017-12-11 | 2019-06-18 | 航天信息股份有限公司 | A kind of temperature monitoring method and device |
| CN110907015A (en) * | 2019-08-30 | 2020-03-24 | 南京邮电大学 | Liquid level monitoring method based on RFID (radio frequency identification) in indoor environment |
| CN113570825A (en) * | 2021-08-12 | 2021-10-29 | 江苏奥斯拓体育科技有限公司 | Swimming pool drowning prevention early warning, positioning and lifesaving system based on Bluetooth technology |
| CN116539088A (en) * | 2023-05-05 | 2023-08-04 | 青岛海威茨仪表有限公司 | Bubble depth judgment model and method for instrument, detection system and method |
| CN116539088B (en) * | 2023-05-05 | 2023-11-17 | 青岛海威茨仪表有限公司 | Method, system and method for judging bubble depth of instrument |
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