CN202838371U - System for identity recognition and working state judgment/state information acquisition of underground facilities - Google Patents
System for identity recognition and working state judgment/state information acquisition of underground facilities Download PDFInfo
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- CN202838371U CN202838371U CN 201220338463 CN201220338463U CN202838371U CN 202838371 U CN202838371 U CN 202838371U CN 201220338463 CN201220338463 CN 201220338463 CN 201220338463 U CN201220338463 U CN 201220338463U CN 202838371 U CN202838371 U CN 202838371U
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Abstract
The utility model discloses a system for identity recognition and working state judgment of underground facilities and a system for identity recognition and state information acquisition of underground facilities. One disclosed system comprises a radio frequency reader-writer arranged on the ground and a passive radio frequency tag arranged underground; the tag comprises a coil, an identification circuit, a resonant capacitor and a normally-open sensor switch which is located between the coil and the resonant capacitor; and the identification circuit comprises a radio frequency chip in which identity recognition information of an underground facility is stored and a matching capacitor. The sensor switch is closed when sensed state information of the underground facility exceeds a preset limit value. The other disclosed system comprises a radio frequency reader-writer arranged on the ground and a passive radio frequency tag arranged underground, wherein the tag comprises a coil, a radio frequency chip, a matching circuit and a sensor, the radio frequency chip is used for modulating and demodulating electromagnetic signals, rectifying alternating signals and storing identity recognition information of an underground facility, the matching circuit is used for matching the coil with the radio frequency chip, and the sensor is used for acquiring state information of the underground facility.
Description
Technical field
The present invention relates to the application of radio-frequency (RF) identification (RFID) technology, more specifically, relate to REID in the identification of underground installation and the application aspect the duty judgement.
Background technology
Radio-frequency (RF) identification is RFID (Radio Frequency Identification) technology, claim again electronic tag, radio frequency identification, it is a kind of communication technology, it can be identified specific objective and read and write related data by radio signal, and need not to set up machinery between recognition system and the specific objective or optics contacts.At present, location and tracking for underground pipeline or cable (terminal box), generally use the scheme that adopts REID, this scheme adopts so a kind of system: this system forms by being embedded in underground concentrator marker and ground steady arm based on inductive coil.This steady arm is determined the position of concentrator marker by the electromagnetic intensity that detects its place environment.And for the concentrator marker with radio-frequency (RF) identification chip, this steady arm can also be read the information such as identification data corresponding to the underground installation relevant with this concentrator marker, set-up time.
But this type of scheme can only be accomplished the identification to underground installation at present, and they do not have the function that the internal operation state of underground installation is detected (such as status informations such as the temperature that gathers these underground installations, humidity, gas concentrations).And this category information plays very important effect for the state of the underground installation of monitoring such as water supply pipe or gas pipeline etc. and in time discovery accident potential.At present, occurred some on the market and detected the device that water supply pipe leaks, but these devices are normally wired, and need to provide for it power supply to carry out work.
At present, existed some about underground installation or object being carried out the patent of the technical scheme of identification and condition monitoring.For example, be that on August 13rd, 2010 submitted to and that obtain the authorization on June 8th, 2011, as to be entitled as " based on the concrete quality monitoring system of RFID " Chinese patent ZL201020290916.2 in disclosed a kind of concrete quality monitoring system based on RFID, this system comprises temperature collecting cell (being comprised of RFID label and temperature sensor etc.), TU Trunk Unit, read-write transmission unit, receiving terminal and analysis and evaluation unit.Wherein, thermometric is carried out in this temperature sensor Transducers Embedded in Concrete inside, and the RFID label is positioned at outside the concrete, collects the temperature data that is obtained by this temperature sensor.This temperature data is sent to the read-write transmission unit after the TU Trunk Unit transmission, be sent to receiving terminal by the read-write transmission unit again, obtains the strong concrete degrees of data after software is processed, and is used for the concrete quality monitoring and evaluation.But, this patent for to as if concrete, but not underground installation or object are carried out identification and status monitoring.
In addition, be that on October 9th, 1987 submitted to and described a kind of concentrator marker that buries object for the location on October 10th, 1989 in the US Patent No. 4,873,533 that authorize, that be entitled as " Marker for Locating a Buried Object ".This concentrator marker is embedded in undergroundly with burying object, and it comprises the antenna of passive resonant type.When the initial position of this concentrator marker that buries changed, this antenna became and can not operate.When the initial position of this concentrator marker changed, being used for that as the lead-in wire of the part of this antenna and/or mercury cut-off this antenna is become can not operate.Obviously, in this patent, do not relate to the problem of underground installation or object being carried out status monitoring.
Therefore, need to design wireless and passive identification and duty and judge system, to realize tracking and the monitoring management to underground installation.
The utility model content
The prior art of mentioning in view of the aforementioned technical background and the technological deficiency or the inferior position that wherein exist, at least one purpose of the present utility model is to overcome at least one technological deficiency or the inferior position that exists in the above-mentioned prior art.
Particularly, a purpose of the present utility model is to provide the identity that can identify underground installation (such as cable, running water pipe, gas pipeline etc.) and the system of judging the duty of this underground installation.
Another purpose of the present utility model is to realize identifying the identity of underground installation and judge qualitatively the system of the duty (as normal or unusually) of this underground installation with relatively low cost.
Another purpose of the present utility model is to realize the system that can identify the identity of underground installation and judge quantitatively the duty (such as physical parameters such as its temperature, humidity) of this underground installation with relatively low cost.
According to an embodiment of the present utility model, the system that provides a kind of identification for underground installation and duty to judge, this system comprises:
Be positioned at the frequency read/write on ground; With
Be positioned at the underground passive RF label relevant with described underground installation, described passive RF label comprises:
Coil,
Identification circuit, it comprises matching capacitance, and is connected with described coil, the resonance frequency of the lc circuit that forms is first frequency,
Resonant capacitance, when it was connected with described coil, the resonance frequency of the lc circuit that forms was the second frequency that is different from described first frequency, and
The sensing switch of often opening is arranged between described coil and the resonant capacitance, and when the status information of the described underground installation of institute's sensing surpassed predetermined limit value, described sensing switch was closed, so that described coil is connected with described resonant capacitance.
According to another embodiment of the present utility model, the another kind of identification of underground installation and the system that duty is judged of being used for is provided, this system comprises:
Be positioned at the frequency read/write on ground; With
Be positioned at the underground passive RF label relevant with described underground installation, described passive RF label comprises:
Coil,
Radio frequency chip, it is connected with described coil, and be used for carrying out the modulation and demodulation of radiofrequency signal, and the AC signal of described coil coupling is carried out rectification and output dc voltage, and store the identity identification information of described underground installation in the described radio frequency chip,
Match circuit is used for described coil and described radio frequency chip are mated mutually,
Sensor, and be coupled by the external digital interface between the described radio frequency chip, be used for gathering the described status information of described underground installation.
The utility model has following technique effect at least:
At first, similar system and device with respect to prior art, the disclosed system of the utility model can either carry out identification to underground installation, can judge the duty of this underground installation again, thereby can more effectively monitor underground installation (such as running water pipe, gas pipeline, cable etc.) and in time its operation irregularity is reacted.
Secondly, because the described radio-frequency (RF) tag of using in the utility model is passive (it can work by the electromagnetic wave that receives from frequency read/write), compare with those similar systems that need to use battery to power, it has reduced integrated cost effectively.
Moreover, because radio-frequency (RF) tag of the present utility model is passive, with those battery-powered similar system is compared, its operation and maintenance is more simple and convenient.
Description of drawings
For above-mentioned and other purpose of the present utility model, feature and advantage can more be become apparent, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
The system schematic that Fig. 1 judges according to an embodiment of the present utility model, the identification that is used for underground installation and duty;
Fig. 2 is the structured flowchart according to a kind of passive RF label of an embodiment of the present utility model;
Fig. 3 is the schematic diagram for the capacitance of the resonant capacitance of the passive RF label embodiment of calculating chart 2;
Fig. 4 is the structured flowchart according to a kind of passive RF label of another embodiment of the present utility model;
Fig. 5 is the structured flowchart of the radio frequency chip among the passive RF label embodiment of Fig. 4;
Fig. 6 is the schematic diagram that is used for transmitting the external data interface of data between radio frequency chip and sensor among the passive RF label embodiment of Fig. 4.
Embodiment
The below describes embodiment of the present utility model in detail, and the example of described embodiment is shown in the drawings, and wherein identical label represents same or analogous element from start to finish.The embodiment that describes below with reference to accompanying drawing is exemplary, is intended to explain the utility model, and can not be interpreted as a kind of restriction of the present utility model.
As shown in Figure 1, underground installation identification and the state judgement system according to embodiment of the present utility model comprises the two large divisions: the frequency read/write that rest on the ground; And be positioned at the underground passive RF label that is associated with this underground installation.In actual applications, the frequency of operation of this system can be chosen the interior value of frequency range of 38kHz-625kHz.
This frequency read/write has two kinds of mode of operations of sending and receiving radiofrequency signal.This passive RF label can receive the radiofrequency signal that comes from frequency read/write, and is translated into the required electric energy of this label normal operation.Simultaneously, when this passive RF label comprised radio frequency chip, it can carry out modulation and demodulation to radiofrequency signal by this radio frequency chip, in order to carry out data communication with frequency read/write.
Be the function that realizes that the underground installation state is judged, for this radio-frequency (RF) tag, two kinds of different implementations are arranged: namely radio-frequency (RF) tag adopts sensing switch to identify the identity of underground installation and the scheme that the duty of underground installation is qualitatively judged, and radio-frequency (RF) tag is identified the identity of underground installation with sensor and the duty of this underground installation carried out the scheme of quantitative monitoring.
Referring to Fig. 2, wherein show the embodiment of the passive RF label that adopts sensing switch.This passive RF label comprises following components:
Coil: it also is the inductive part of lc circuit as RF-coupled antenna.This coil is generally formed according to mould or skeleton coiling by pure copper wire, its inductance value range according to the difference of frequency of operation may for the hundreds of microhenry to several milihenries.
Identification circuit: it comprises the parts such as radio frequency chip and matching capacitance, and be connected with aforementioned coil, the lc circuit that forms like this will locate to occur resonance at second frequency Fres2 (such as 120kHz), and store the identity identification information of underground installation associated therewith in this radio frequency chip.In the object lesson of the identification circuit that can be used for the purpose of this utility model, radio frequency chip can use the chip such as the concentrator marker that is used for the underground pipeline monitoring (concentrator marker that Dynatel 2500 series of producing such as 3M company are used), and matching capacitance is preferentially selected the stable and high C0G thin-film capacitor of Q value of electric capacity.
Resonant capacitance: when it was connected with coil, the resonance frequency of the lc circuit that forms was Fres1 (being different from Fres2, such as 230kHz).
Sensing switch: it is arranged between above-mentioned coil and the resonant capacitance, can be any type of sensing switchs such as humidity, temperature, and the default conditions of this sensing switch are for often opening.When the state value (such as temperature, humidity, pressure etc.) of the underground installation of institute's sensing surpassed predetermined limit value, this sensing switch was closure, this so that coil be connected with resonant capacitance, and at first frequency Fres1 place generation resonance.For example, the sensing switch that can be used for passive RF label of the present utility model can be that model is the temperature switch of TS-200SR, the humidity switch that model is TKS-1, etc.
Referring to Fig. 3, the capacitance of this resonant capacitance can be determined according to following formula:
C
re＝C
eq-C
es-C
ei-C
pr (1)
Wherein, C
ReThe capacitance that represents described resonant capacitance, C
EsThe equivalent capacitance value that represents described sensing switch, C
EiThe equivalent capacitance value that represents described identification circuit, C
PrThe parasitic capacitance value of expression equivalence, F
2Represent described first frequency, and L
cThe inductance value that represents described coil.
Under normal conditions, above-mentioned identification circuit is connected with coil.Therefore, when the radio frequency signal frequency that sends when frequency read/write is consistent with Fres2, the identity identification information of the underground installation that the radio frequency chip in this radio-frequency (RF) tag is stored will be read out.When the radio frequency signal frequency that sends when frequency read/write is consistent with Fres1, because this moment, coil not yet was connected with resonant capacitance, so the frequency that frequency read/write can't detect from described radio-frequency (RF) tag is the obvious electromagnetism intensity variation of the radiofrequency signal of Fres1.
When since underground installation around environment change, cause temperature or the humidity of this underground installation to rise above predetermined limit value, thereby when causing this sensing switch closed, because this moment, coil was connected with resonant capacitance, if the radiofrequency signal that this frequency read/write is Fres1 to this passive RF label transmission frequency, its frequency that will detect from this passive RF label is the obvious electromagnetism intensity variation (changing such as the electromagnetism intensity greater than 70dB) of the radiofrequency signal of Fres1.Yet the radiofrequency signal that this moment, if this frequency read/write was Fres2 to this passive RF label transmission frequency, it can not obtain the identity identification information of relevant underground installation.Accordingly, the state that can judge underground installation this moment has exceeded predetermined limit value, thereby, can in time carry out fault diagnosis and maintenance to this underground installation.
That is to say, comprise in the situation of radio frequency chip at the identification circuit of above-mentioned passive RF label, utilize this system that underground installation is carried out the method that identification and duty judge to be:
Send the read command radiofrequency signal of second frequency Fres2 to underground passive RF label by ground frequency read/write;
If this frequency read/write receives the radiofrequency signal from identity identification information second frequency Fres2, that comprise this underground installation of this passive RF label, then this frequency read/write carries out the identification of this underground installation, and judges that the duty of this underground installation is normal;
If this frequency read/write does not receive the radiofrequency signal from identity identification information second frequency Fres2, that comprise this underground installation of this passive RF label, then this frequency read/write sends the radiofrequency signal of first frequency Fres1 to this passive RF label, if (for example change to obvious electromagnetism intensity from the radio-frequency signal detection from this first frequency Fres1 of this passive RF label, the electromagnetism intensity that detects changes greater than 70dB), judge that then the duty of this underground installation is for unusual.
Should be pointed out that the identification circuit among Fig. 2 also can not comprise radio frequency chip, and only comprise matching capacitance.At this moment, if the radiofrequency signal that frequency read/write is Fres2 to this radio-frequency (RF) tag transmission frequency, and this sensing switch does not have closure, this frequency read/write will can not obtain the identity identification information of relevant underground installation, but be that the obvious electromagnetism intensity of the radiofrequency signal of Fres2 changes the existence that (electromagnetism intensity that for example, detects changes greater than 70dB) determines relevant underground installation by detecting frequency from this radio-frequency (RF) tag.
Referring to Fig. 4, wherein show the embodiment of the passive RF label that uses sensor.In this embodiment, this passive RF label comprises following components:
Coil: it also is the inductive part of lc circuit as RF-coupled antenna.This coil is generally formed according to mould or skeleton coiling by pure copper wire, its inductance value range according to the difference of frequency of operation may for the hundreds of microhenry to several milihenries.
Radio frequency chip: it is a special IC (ASIC) normally, be connected with this coil, be used for carrying out the modulation and demodulation of radiofrequency signal, and the AC signal of coil coupling carried out rectification, come as this radio-frequency (RF) tag and sensor power supply take output dc voltage, and store the identity identification information of described underground installation in the described radio frequency chip.This radio frequency chip is generally special-purpose low frequency radio frequency chip, such as the chip of the concentrator marker that is used for the underground pipeline monitoring (chips of the concentrator markers that Dynatel 2500 series of producing such as 3M company are used).
Match circuit: capacitive part and other elements that it comprises lc circuit are used for making between this radio frequency chip and this coil and mutually mate, and help radio frequency chip to play radio receiving-transmitting unit.
Sensor: it is the low-power consumption sensor with digital interface, is coupled with described radio frequency chip, is used for gathering the described status information of described underground installation.For example, this sensor can be one or more in the multiple sensors such as temperature, humidity, pressure transducer.Should understand, this radio frequency chip can with a sensors coupled, also can with a plurality of sensors coupled, as long as the direct current energy that gets of this radio frequency chip rectifier is enough to drive these a plurality of sensors.Particularly, this sensor is generally and has Interface for digital communication (such as SPI interface or I
2C interface) digital transducer, for example model is that digital temperature sensor, the model of ADT7301 are the digital temperature-humidity sensor of RHT01-SP, etc.
In practice, the coil of resonance and the ac voltage signal that electric capacity (such as the electric capacity in the match circuit) will be formed to this radio frequency chip occur.This this ac voltage signal of radio frequency chip energy rectification is in order to be that himself and sensor are powered.
Referring to Fig. 5, wherein show the structured flowchart of the radio frequency chip among the passive RF label embodiment of Fig. 4.As can be seen from Figure 5, this passive RF chip comprises: power module, and it is used for the AC signal of described coil coupling is carried out rectification, in order to be described radio frequency chip and the power supply of described sensor; The modulator/demodulator module, it is used for demodulation from the radiofrequency signal of described frequency read/write reception and modulates the radiofrequency signal that will send to described frequency read/write; Memory module (for example EEPROM among the figure and configuration register) is used for identity identification information and the status information of storing described underground installation; And the external digital interface, be used for the exchanges data between described sensor and the described radio frequency chip.
Particularly, the alternating voltage of this power module rectification coil coupling, and to this radio frequency chip and sensor power supply.This detuner receives to conciliate and transfers from the radiofrequency signal of frequency read/write.Then, according to this demodulated order (such as read/write EEPROM and this external digital interface of read/write), to carry out corresponding operation.Afterwards, will carry out the resulting echo message of corresponding operating by this modulator and send to frequency read/write.
As shown in Figure 6, wherein specifically illustrated external digital interface in the above-mentioned radio frequency chip.This external digital interface for example can be I
2C, SPI etc. be known interface in the industry.
Utilize this system to the method that underground installation carries out identification and duty judgement to be:
Send the order of the identity identification information of the underground installation that reads associated to this passive RF label by this frequency read/write;
This passive RF label be coupled electromagnetic wave that this frequency read/write sends, power on and this order of reading identity identification information resolved;
This passive RF label reads the wherein described identity identification information of storage, and sends it to this frequency read/write;
This frequency read/write receives this identity identification information, and sends the order of reading related sensor to this passive RF label;
This passive RF label be coupled electromagnetic wave that this frequency read/write sends, power on and the order of this read sensor resolved;
This passive RF label judges whether the identity information in the described order is consistent with the identity of self, if inconsistent, then do not deal with; If consistent, then read the data of described sensor from this external digital interface, and send it to this frequency read/write.
Then, this frequency read/write receives this sensing data, carries out corresponding calculating, and shows the result.
As the expansion of this system, this frequency read/write can communicate, record identity identification information and status information by wired or wireless interface and monitoring center software, in order to follow the tracks of and review.
In sum, this underground installation identification and state judge that system has added status monitoring function on the basis of existing underground location and identity recognizing technology.Like this, can keep original recognition function, also satisfy the demand that the client monitors the state of underground installation.And, for client's different demands, can select any scheme in the above-mentioned quantitative and qualitative analysis scheme.
In the real work system, frequency read/write generally adopts the frequency read/write of the fixture system that is used at present the underground pipeline detection, such as the positioning system Dynatel 2500 serial employed frequency read/writes that are used for Electromagnetic Survey of Underground Pipelines of 3M company product.Yet, in actual use, need to adjust the firmware in this positioning system according to actual conditions.
Below, will with said system in the example that is applied as aspect the monitoring of underground running water pipe, specify principle of work and the operating process of this system.
In this example, this system comprises two parts: frequency read/write and radio-frequency (RF) tag, frequency read/write and the radio-frequency (RF) tag used in Dynatel 2500 series such as 3M company product.Except conventional components, this radio-frequency (RF) tag comprises that also for example model is the digital temperature-humidity sensor of RHT01-SP, and this sensor can detect the humidity of the surrounding environment of this underground running water pipe.
With after the sealing of this radio-frequency (RF) tag (humidity sensor is exposed), with it with corresponding running water pipe section installation in position.This radio-frequency (RF) tag generally is positioned at underground 1.2 meters to 1.5 meters depths.
At first, the frequency of operation of this frequency read/write is set to consistent with the frequency of operation of buried radio-frequency (RF) tag, in this example, for example this frequency of operation is set to 82kHz, and this frequency read/write is arranged at the detection that the sending/receiving pattern is carried out radio-frequency (RF) tag.When frequency read/write being placed a certain position so that the electromagnetism intensity of its induction apparently higher than its nearby the position respond to electromagnetism intensity the time, can confirm that this position arranged beneath has radio-frequency (RF) tag.Then, this frequency read/write sends to this radio-frequency (RF) tag and reads the identity information order, with reading of the identity information that carries out running water pipe.After the identity information success of reading this running water pipe, this frequency read/write sends the read transducer data command to this radio-frequency (RF) tag.Behind the read transducer data command that receives from this frequency read/write, radio-frequency (RF) tag judges that at first the identity information that comprises in this order is whether consistent with the identity information in self storer, if inconsistent, then it does not carry out respective handling.If both are consistent, then this radio-frequency (RF) tag is read the data that above-mentioned model is the sensor related with this running water pipe section of RHT01-SP, and the humidity data that obtains is sent to this frequency read/write with the form of radiofrequency signal.After receiving this humidity data, frequency read/write can calculate and show the result accordingly.If this result of calculation exceeds predefined limit value (this represents that may there be breakage in this running water pipe section), according to setting in advance, this frequency read/write can start alarm.
The identification of this underground installation and duty judge that system not only can be used for the monitoring of community water supply pipe, also can be used for the monitoring of other similar underground installations (such as combustion gas, electric power, the pipeline such as communication and cable).
Above-described embodiment only exemplary explanation principle of the present utility model and effect thereof, but not be used for restriction the present invention, know and it will be understood by those skilled in the art that, in the situation that do not depart from spirit and scope of the present utility model, any changes and improvements that the utility model is done all are in the scope of the present utility model.Protection domain of the present utility model should be determined according to its appended claim.
Claims (9)
1. one kind is used for the identification of underground installation and the system that duty is judged, comprising:
Be positioned at the frequency read/write on ground; With
Be positioned at the underground passive RF label relevant with described underground installation, described passive RF label comprises:
Coil,
Identification circuit, it comprises matching capacitance, and is connected with described coil, the resonance frequency of the lc circuit that forms is first frequency,
Resonant capacitance, when it was connected with described coil, the resonance frequency of the lc circuit that forms was the second frequency that is different from described first frequency, and
The sensing switch of often opening is arranged between described coil and the resonant capacitance, and when the status information of the described underground installation of institute's sensing surpassed predetermined limit value, described sensing switch was closed, so that described coil is connected with described resonant capacitance.
2. the system as claimed in claim 1 is characterized in that, described identification circuit also comprises radio frequency chip, stores the identity identification information of described underground installation in the described radio frequency chip.
3. the system as claimed in claim 1 is characterized in that, described sensing switch is the humidity sensor switch.
4. the system as claimed in claim 1 is characterized in that, described sensing switch is temperature sensor switch.
5. one kind is used for the identification of underground installation and the system of status information capture, comprising:
Be positioned at the frequency read/write on ground; With
Be positioned at the underground passive RF label relevant with described underground installation, described passive RF label comprises:
Coil,
Radio frequency chip, it is connected with described coil, and be used for carrying out the modulation and demodulation of radiofrequency signal, and the AC signal of described coil coupling is carried out rectification and output dc voltage, and store the identity identification information of described underground installation in the described radio frequency chip,
Match circuit is used for described coil and described radio frequency chip are mated mutually,
Sensor is coupled with described radio frequency chip, is used for gathering the described status information of described underground installation.
6. system as claimed in claim 5 is characterized in that, described sensor is a kind of in temperature sensor, humidity sensor or the pressure transducer.
7. system as claimed in claim 5 is characterized in that, described radio frequency chip comprises:
Power module is used for the AC signal of described coil coupling is carried out rectification, in order to be described radio frequency chip and the power supply of described sensor;
The modulator/demodulator module is used for demodulation from the radiofrequency signal of described frequency read/write reception and modulates the radiofrequency signal that will send to described frequency read/write;
Memory module is used for identity identification information and the status information of storing described underground installation; And
The external digital interface is used for the exchanges data between described sensor and the described radio frequency chip.
8. system as claimed in claim 7 is characterized in that, described external digital interface is internal integrated circuit I
2C interface.
9. system as claimed in claim 7 is characterized in that, described external digital interface is serial peripheral equipment interface SPI.
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| CN 201220338463 CN202838371U (en) | 2012-07-12 | 2012-07-12 | System for identity recognition and working state judgment/state information acquisition of underground facilities |
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| CN104165708A (en) * | 2014-08-28 | 2014-11-26 | 陈刚 | Underground cable positioning thermometer and application thereof |
| CN106358813A (en) * | 2016-10-28 | 2017-02-01 | 深圳市金瑞铭科技有限公司 | Flowerpot capable of detecting soil humidity |
| CN107942865A (en) * | 2017-11-29 | 2018-04-20 | 胜利阀门有限公司 | One kind is used for valve underground pipe network Internet of Things intelligence control system |
| CN108155990A (en) * | 2018-02-13 | 2018-06-12 | 青岛厚科信息工程有限公司 | Temperature difference charging secrecy sensing module and its electric power storage and information transferring method |
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| CN111199265A (en) * | 2018-11-16 | 2020-05-26 | 博西华电器（江苏）有限公司 | Radio frequency identification tag device, radio frequency identification tag system, article management method, and storage device |
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| CN104165708A (en) * | 2014-08-28 | 2014-11-26 | 陈刚 | Underground cable positioning thermometer and application thereof |
| CN106358813A (en) * | 2016-10-28 | 2017-02-01 | 深圳市金瑞铭科技有限公司 | Flowerpot capable of detecting soil humidity |
| CN107942865A (en) * | 2017-11-29 | 2018-04-20 | 胜利阀门有限公司 | One kind is used for valve underground pipe network Internet of Things intelligence control system |
| CN108155990A (en) * | 2018-02-13 | 2018-06-12 | 青岛厚科信息工程有限公司 | Temperature difference charging secrecy sensing module and its electric power storage and information transferring method |
| CN108199843A (en) * | 2018-02-13 | 2018-06-22 | 青岛厚科信息工程有限公司 | Vibrations charging secrecy sensing module and its electric power storage and information transferring method |
| CN108155990B (en) * | 2018-02-13 | 2024-05-31 | 青岛厚科信息工程有限公司 | Thermoelectric charging secret sensing module and electric storage and information transmission method thereof |
| CN108199843B (en) * | 2018-02-13 | 2024-10-01 | 青岛厚科信息工程有限公司 | Vibration charging confidentiality sensing module and electric storage and information transmission method thereof |
| CN111199265A (en) * | 2018-11-16 | 2020-05-26 | 博西华电器（江苏）有限公司 | Radio frequency identification tag device, radio frequency identification tag system, article management method, and storage device |
| CN109916446A (en) * | 2018-12-29 | 2019-06-21 | 北京工业大学 | The electronic detection system test platform of the indoor outdoor true material different depth of monitoring |
| CN109916446B (en) * | 2018-12-29 | 2021-06-25 | 北京工业大学 | Indoor monitoring outdoor real material different degree of depth's electronic detection system test platform |
| CN113988233A (en) * | 2021-10-28 | 2022-01-28 | 武汉华宇云创智能技术有限公司 | System and method for transmitting sensor information by chip-level integrated radio frequency |
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