CN112284354A - Passive wireless piezoelectric sensor and passive monitoring system - Google Patents
Passive wireless piezoelectric sensor and passive monitoring system Download PDFInfo
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- CN112284354A CN112284354A CN202011007461.3A CN202011007461A CN112284354A CN 112284354 A CN112284354 A CN 112284354A CN 202011007461 A CN202011007461 A CN 202011007461A CN 112284354 A CN112284354 A CN 112284354A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C13/00—Surveying specially adapted to open water, e.g. sea, lake, river or canal
- G01C13/002—Measuring the movement of open water
- G01C13/006—Measuring the movement of open water horizontal movement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/16—Measuring force or stress, in general using properties of piezoelectric devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/08—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of piezoelectric devices, i.e. electric circuits therefor
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/185—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators using fluid streams
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Abstract
The present disclosure discloses a passive wireless piezoelectric sensor and a passive monitoring system, the passive wireless piezoelectric sensor includes: the system comprises an energy absorption monitoring component, a piezoelectric transducer and a wireless communication component; wherein: the pumping energy monitoring assembly is used for pumping kinetic energy from any direction of the liquid and detecting the motion state of the liquid; the piezoelectric energy conversion device is connected with the energy absorption monitoring assembly and the wireless communication assembly and is used for converting the kinetic energy into electric energy and outputting the electric energy; the wireless communication component is used for receiving the electric energy and sending out the liquid motion state information detected by the energy absorption monitoring component as a wireless signal. Through implementing the technical scheme disclosed by the disclosure, the passive wireless piezoelectric sensor can realize long-term continuous self-power supply in a liquid environment, and has the advantages of small volume, simple structure and low manufacturing cost.
Description
Technical Field
The disclosure relates to the technical field of semiconductor devices, in particular to a passive wireless piezoelectric sensor and a passive monitoring system.
Background
With the more and more intensive research on water resources such as oceans, rivers, lakes and the like, the more and more the demand for accurate detection of the variable complex environment inside the water resources is strong. At present, the ocean monitoring sensor has huge application in the aspects of ocean investigation, ocean science research and the like. For example, marine environmental protection, resource protection and management, disaster monitoring, marine engineering, marine production operations, marine military, underwater security intrusion monitoring and the like are realized by means of a marine monitoring sensor network. In addition, the fuel in the tank truck for transporting fuel is easy to be combusted and exploded due to excessive fluctuation of fuel. The fluctuation of the oil surface of the oil tank truck can be effectively monitored, and the pressurizing and explosion risks caused by the volatilization of the oil can be reduced.
In general, a marine monitoring sensor network may comprise two parts, namely: a wireless sensor network deployed above the sea, and an underwater sensor network deployed below the water surface. Wherein:
1) the water surface wireless sensor network uses radio waves for communication and networking, can be used for monitoring information related to the sea, such as wind direction, wave height, tide, water temperature, illumination, water pollution and the like, and is responsible for information transmission and the like with the underwater sensor network;
2) at present, underwater sensor networks mainly use underwater sound to realize communication and networking, generally use batteries to supply power, the energy consumption of transmitting information by underwater nodes is often dozens of times or even hundreds of times greater than that of receiving information, and the life cycle of underwater monitoring networks is directly influenced by the balanced consumption of energy.
However, the inaccessibility of the sensor location may make it difficult for service personnel to access and replace the batteries in the sensor. Furthermore, the location of the sensors may subject them to harsh environmental conditions, such as high temperatures, vibration, electromagnetic forces, dirt, rain, snow, and the like. Therefore, the damage or failure of the sensor caused by the battery failure or the long-time exposure to the harsh environment condition can increase the operation cost, and is very unfavorable for the monitoring of the marine environment condition, so that the continuous power supply of the sensor is realized, and the important problem to be solved in the industry is needed.
Disclosure of Invention
In view of this, the present disclosure provides a passive wireless piezoelectric sensor and a passive monitoring system, which can realize long-term continuous self-power supply in a liquid environment, and the passive wireless piezoelectric sensor has a small volume, a simple structure and a low cost, and at least partially solves the problems in the prior art.
To solve the above technical problem, the present disclosure discloses a passive wireless piezoelectric sensor including: the system comprises an energy absorption monitoring component, a piezoelectric transducer and a wireless communication component; wherein: the pumping energy monitoring assembly is used for pumping kinetic energy from any direction of the liquid and detecting the motion state of the liquid; the piezoelectric energy conversion device is connected with the energy absorption monitoring assembly and the wireless communication assembly and is used for converting the kinetic energy into electric energy and outputting the electric energy; the wireless communication component is used for receiving the electric energy and sending out the liquid motion state information detected by the energy absorption monitoring component as a wireless signal.
Optionally, the dip energy monitoring assembly further comprises: a connection ball, a transverse energy absorption monitoring element, a longitudinal energy absorption monitoring element and an underwater energy absorption monitoring element; the transverse energy absorption monitoring element, the longitudinal energy absorption monitoring element and the submerged energy absorption monitoring element are respectively connected with the connecting ball body; wherein: the transverse energy pumping monitoring element is arranged vertically to the horizontal direction of the liquid level, generates bending deformation along with the horizontal flow of the liquid, is used for pumping the kinetic energy of the liquid flowing in the horizontal direction, and monitors the flow speed and the direction of the liquid flowing in the horizontal direction; the longitudinal energy-drawing monitoring element is arranged in parallel to the horizontal direction of the liquid level, generates bending deformation along with the up-and-down flow of the liquid, is used for drawing the kinetic energy of the liquid flowing in the vertical direction and monitoring the flow speed and the direction of the liquid flowing in the vertical direction; the submerged energy-absorbing monitoring element is longitudinally arranged in the liquid and used for absorbing the kinetic energy of the flowing inside the liquid and monitoring the flow speed and the flow direction of the inside of the liquid.
Optionally, the lateral drain energy monitoring element further comprises: a first lateral drain energy monitoring element and a second lateral drain energy monitoring element, the first lateral drain energy monitoring element and the second lateral drain energy monitoring element being disposed at an angle in a same plane; and/or, the longitudinal swamping energy monitoring element further comprises: the first longitudinal energy absorption monitoring element and the second longitudinal energy absorption monitoring element are arranged in a same plane at an angle.
Optionally, the submerged energy monitoring element further comprises: the device comprises a first submerged longitudinal energy absorption monitoring element and a second submerged longitudinal energy absorption monitoring element, wherein the plane of the first submerged longitudinal energy absorption monitoring element and the plane of the second submerged longitudinal energy absorption monitoring element are arranged at an angle.
Optionally, the transverse energy absorption monitoring element is in the shape of an energy absorption rod or an energy absorption sheet, wherein a rod body of the energy absorption rod is made of a flexible piezoelectric material; optionally, the longitudinal energy absorption monitoring element is in the shape of an energy absorption rod or an energy absorption sheet, wherein a rod body of the energy absorption rod is made of a flexible piezoelectric material; optionally, the submerged energy absorption monitoring element is in the shape of an energy absorption rod or an energy absorption sheet, wherein a rod body of the energy absorption rod is made of a flexible piezoelectric material.
Optionally, the flexible piezoelectric material is rubber or plastic, and the voltage difference is generated based on deformation caused by liquid flow.
Optionally, the rod body end is configured with a weight.
Optionally, the wireless communication component further comprises: the monitoring device comprises a monitoring identification unit, a signal transmitting circuit and an antenna; the monitoring identification unit is connected with the signal transmitting circuit and the antenna and used for determining an identity of the pumping energy monitoring assembly correspondingly connected with the monitoring identification unit, and the identity is used for determining the flowing direction of the liquid.
Optionally, the monitoring identification unit further comprises at least one of the following units:
a first lateral monitoring identification unit, one end of which is connected with the first lateral energy absorption monitoring element, and the other end of which is connected with the signal transmitting circuit; the first lateral monitoring identification unit is used for generating an identification number of the first lateral pumping monitoring element; the first transverse energy-sinking monitoring element is connected with the signal transmitting circuit in parallel;
a second transverse monitoring identification unit, one end of which is connected with the second transverse energy absorption monitoring element and the other end is connected with the signal transmitting circuit; the second lateral monitoring identification unit is used for generating an identification number of the second lateral pumping monitoring element; the second transverse energy-sinking monitoring element is connected with the signal transmitting circuit in parallel;
a first longitudinal monitoring identification unit, one end of which is connected with the first longitudinal energy absorption monitoring element, and the other end of which is connected with the signal transmitting circuit; the first longitudinal monitoring identification unit is used for generating an identification number of the first longitudinal pumping monitoring element; the first longitudinal energy sinking monitoring element is connected with the signal transmitting circuit in parallel;
a second longitudinal monitoring identification unit, one end of which is connected with the second longitudinal energy absorption monitoring element and the other end of which is connected with the signal transmitting circuit; the second longitudinal monitoring identification unit is used for generating an identification number of the second longitudinal pumping monitoring element; the second longitudinal energy sinking monitoring element is connected with the signal transmitting circuit in parallel;
one end of the first submerged longitudinal monitoring identification unit is connected with the first submerged longitudinal energy absorption monitoring element, and the other end of the first submerged longitudinal monitoring identification unit is connected with the signal transmitting circuit; the first submerged longitudinal monitoring identification unit is used for generating an identity identification number of the first submerged longitudinal energy absorption monitoring element; the first submerged longitudinal energy absorption monitoring element is connected with the signal transmitting circuit in parallel;
one end of the second underwater longitudinal monitoring identification unit is connected with the second underwater longitudinal energy absorption monitoring element, and the other end of the second underwater longitudinal monitoring identification unit is connected with the signal transmitting circuit; the second underwater longitudinal monitoring identification unit is used for generating an identity identification number of the second underwater longitudinal energy absorption monitoring element; the second submerged longitudinal energy absorption monitoring element is connected with the signal transmitting circuit in parallel.
Optionally, the signal transmitting circuit and the antenna are LC/RLC/RC/quartz oscillators, and are configured to receive and transmit the voltage difference signal generated by the piezoelectric transducer device. Wherein, L is inductance, R is resistance, C is capacitance.
Optionally, an accommodating rod body is arranged on the connecting sphere, the accommodating rod body is communicated with the connecting sphere, and an accommodating space for accommodating the signal transmitting circuit and the antenna is formed in the accommodating rod body and the connecting sphere; in the working process of the passive wireless piezoelectric sensor, the accommodating rod body is exposed out of the liquid level.
In addition, the present disclosure also discloses a passive monitoring system, the system comprising: the monitoring array composed of the passive wireless piezoelectric sensor according to any one of the above aspects is used for monitoring the longitudinal flow velocity component, the transverse flow velocity component and the internal flow velocity component of the liquid flow and sending out a monitoring signal.
Optionally, the passive monitoring system may further include: the receiver is used for receiving the monitoring signals transmitted by the monitoring array; the processor is used for processing the monitoring signal and extracting abnormal features; and the analysis early warning device is used for analyzing and judging the abnormal features according to the pre-established standard features and giving early warning after determining the abnormality.
Optionally, a positioning anchor is configured below at least one wireless passive sensor in the monitoring array.
Optionally, at least one wireless passive sensor in the monitoring array is connected to the bottom of the vehicle-mounted liquid container or the bottom of the water area through a rigid or flexible rope.
Compared with the prior art, the passive wireless piezoelectric sensor and the passive monitoring system disclosed by the disclosure have the following technical effects:
this is disclosed through designing a neotype piezoelectric sensor, is applicable to any liquid environment, and the deformation that causes flexible piezoelectric material through liquid flow converts kinetic energy into the electric energy, realizes long-term, lasting self-power, consequently, needn't consider the power supply problem of device in the use, and has avoided the difficult problem of changing the battery.
And the flexible piezoelectric component of the passive wireless piezoelectric sensor absorbs energy, and simultaneously emits the measured liquid flow information including flow velocity and flow direction through the wireless communication component, so that the accurate and effective feedback of dynamic information to the monitored liquid environment is realized.
In addition, the passive wireless piezoelectric sensor is small in size, simple in structure and low in manufacturing cost, and can be used as disposable monitoring equipment to be thrown into a liquid environment which is inconvenient to replace or recycle. Therefore, the passive monitoring system disclosed by the disclosure adopts the monitoring array consisting of the passive wireless piezoelectric sensors, and can efficiently and accurately complete the monitoring task in the complex environment in the liquid.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram of the components of a passive wireless sensor in an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a passive wireless sensor according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of another configuration of a passive wireless sensor according to an embodiment of the present disclosure;
FIG. 4 is a schematic view of an embodiment of a submerged energy monitoring device;
FIG. 5 is a schematic diagram of another structure of a passive wireless sensor according to an embodiment of the disclosure;
FIG. 6 is a schematic diagram of an internal circuit configuration of a passive wireless sensor according to an embodiment of the present disclosure;
fig. 7 is a schematic diagram of another internal circuit structure of a passive wireless sensor according to an embodiment of the present disclosure.
Description of reference numerals:
10 connecting ball
20 lateral energy absorption monitoring device
21 first lateral energy absorption monitoring device
22 second lateral energy absorption monitor device
30 longitudinal energy absorption monitoring device
31 first longitudinal energy absorption monitoring element
32 second vertical energy absorption monitoring device
40 liquid suction energy monitoring element
41 first submerged longitudinal energy absorption monitoring element
42 second liquid longitudinal energy absorption monitoring element
43 weight element
50 accommodating rod body
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
It should be noted that, in the case of no conflict, the features in the following embodiments and examples may be combined with each other; moreover, all other embodiments that can be derived by one of ordinary skill in the art from the embodiments disclosed herein without making any creative effort fall within the scope of the present disclosure.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
In order to achieve the problem of continuous power supply of the sensor, the present disclosure discloses a passive wireless piezoelectric sensor, and the following describes an embodiment of the passive wireless piezoelectric sensor disclosed in the present disclosure with reference to fig. 1 to 4:
referring to fig. 1, in the present embodiment, the passive wireless piezoelectric sensor includes: the device comprises a swabbing energy monitoring component, a piezoelectric transducer and a wireless communication component. The pumping energy monitoring assembly is used for pumping kinetic energy from any direction of the liquid and detecting the motion state of the liquid. The piezoelectric energy conversion device is connected with the energy absorption monitoring component and the wireless communication component and used for converting kinetic energy into electric energy and outputting the electric energy. The wireless communication assembly is used for receiving electric energy and sending out the liquid motion state information detected by the energy absorption monitoring assembly as a wireless signal.
As an alternative implementation, referring to fig. 2, the draw energy monitoring assembly of the above embodiment may further include: a connection ball 10, a lateral pumping energy monitoring device 20, a longitudinal pumping energy monitoring device 30 and a submerged pumping energy monitoring device 40; the lateral pumping energy monitoring device 20, the longitudinal pumping energy monitoring device 30 and the submerged pumping energy monitoring device 40 are connected to the connecting ball 10 respectively. In this embodiment:
the transverse energy pumping monitoring element 20 is arranged vertically to the horizontal direction of the liquid level, generates bending deformation along with the horizontal flow of the liquid, is used for pumping the kinetic energy of the liquid flowing in the horizontal direction, and monitors the flow speed and the direction of the liquid flowing in the horizontal direction;
the longitudinal energy-drawing monitoring element 30 is arranged in parallel with the liquid level in the horizontal direction, generates bending deformation along with the up-and-down flow of liquid, is used for drawing the kinetic energy of the liquid flowing in the vertical direction, and monitors the flow speed and the direction of the liquid flowing in the vertical direction;
the submerged energy monitoring element 40 is disposed longitudinally inside the liquid for drawing up kinetic energy of the flow inside the liquid and monitoring the flow velocity and direction inside the liquid.
In the embodiment, a novel piezoelectric sensor is designed, so that the piezoelectric sensor is suitable for any liquid environment, kinetic energy is converted into electric energy through deformation caused by liquid flowing to a flexible piezoelectric material, and long-term and continuous self-power supply is realized, so that the power supply problem of a device is not considered in the using process, and the problem of battery replacement is avoided. And this passive wireless piezoelectric sensor's piezoelectric transducer, when drawing the ability, the liquid flow information that will survey includes velocity of flow and flow direction, sends out through the wireless communication subassembly, realizes accurate, the effective dynamic information that feeds back to the liquid environment that monitors. In addition, the passive wireless piezoelectric sensor is small in size, simple in structure and low in manufacturing cost, can be used as disposable monitoring equipment, is very suitable for being put into a liquid environment which is inconvenient to replace or recycle, and realizes monitoring.
As an alternative implementation, referring to fig. 3, the lateral pumping monitor element 20 may further include: the first lateral pumping monitoring element 21 and the second lateral pumping monitoring element 22 are embedded in the connecting ball 10, and the first lateral pumping monitoring element 21 and the second lateral pumping monitoring element 22 are disposed at an angle in the same plane, such as perpendicular to each other.
As an alternative implementation, referring to fig. 3, the longitudinal pumping energy monitoring element 30 may further include: the first longitudinal pumping energy monitoring element 31 and the second longitudinal pumping energy monitoring element 32 are embedded in the connecting ball 10, and the first longitudinal pumping energy monitoring element 31 and the second longitudinal pumping energy monitoring element 32 are disposed at an angle in the same plane, such as perpendicular to each other.
As an alternative implementation, referring to fig. 3, the submerged energy monitoring element 40 may further include: the first submerged longitudinal energy absorption monitoring element 41 and the second submerged longitudinal energy absorption monitoring element 42 are respectively embedded in the connecting ball 10, and the planes of the energy absorption panels of the first submerged longitudinal energy absorption monitoring element 41 and the second submerged longitudinal energy absorption monitoring element 42 are perpendicular to each other.
As an alternative implementation manner, the transverse absorption energy monitoring element 20 may be in the shape of an energy absorption rod or an energy absorption sheet, wherein a rod body of the energy absorption rod is made of a flexible piezoelectric material. Optionally, the energy-extracting rod is provided with a counterweight at the end of the rod body.
As an alternative implementation manner, the longitudinal absorption energy monitoring element 30 is in the shape of an energy absorption rod or an energy absorption sheet, wherein a rod body of the energy absorption rod is made of a flexible piezoelectric material. Optionally, the energy-extracting rod is provided with a counterweight at the end of the rod body.
As an alternative implementation manner, the submerged energy absorption monitoring element 40 is in the shape of an energy absorption rod or an energy absorption sheet, wherein a rod body of the energy absorption rod is made of a flexible piezoelectric material. Optionally, the energy-extracting rod is provided with a counterweight at the end of the rod body.
As an alternative implementation, the flexible piezoelectric material is rubber or plastic, and the voltage difference is generated based on deformation caused by liquid flow.
As an alternative realization, as shown in fig. 4, the energy extraction rod is provided with a counterweight 43 at its rod body end. The weight 43 may serve as a positioning aid for the antenna portion to be positioned above and to expose the liquid surface.
As an optional implementation manner, the wireless communication component further includes: monitoring identification unit, signal transmission circuit and antenna.
As an optional implementation manner, the monitoring identification unit is connected to the signal transmitting circuit and the antenna, and is configured to determine an identity of the pumping energy monitoring component correspondingly connected to the monitoring identification unit, where the identity is used to determine a flowing direction of the liquid. Optionally, the monitoring identification unit in the embodiment may be an inductive device, such as L shown in fig. 70-L6The different energy monitoring components generate different voltage signals to form respective identification marks.
As an alternative implementation manner, the signal transmitting circuit and the antenna are LC/RLC/RC/quartz oscillators, and are used for receiving and transmitting the voltage difference signal generated by the piezoelectric transducer device.
Referring to fig. 4, as an alternative implementation manner, a receiving rod 50 is disposed on the connecting sphere, and the receiving rod is communicated with the connecting sphere 10, and a receiving space for receiving the signal transmitting circuit and the antenna is disposed in the receiving rod and the connecting sphere; in the working process of the passive wireless piezoelectric sensor, the accommodating rod body is exposed out of the liquid level.
As an optional implementation manner, the monitoring identification unit in the foregoing embodiment may further include at least one of the following units:
a first transverse monitoring identification unit, one end of which is connected with the first transverse energy absorption monitoring element and the other end is connected with the signal transmitting circuit; the first transverse monitoring identification unit is used for generating an identification number of the first transverse energy absorption monitoring element; the first transverse energy-sinking monitoring element is connected with the signal transmitting circuit in parallel;
a second transverse monitoring identification unit, one end of which is connected with the second transverse energy absorption monitoring element and the other end is connected with the signal transmitting circuit; the second transverse monitoring identification unit is used for generating an identification number of the second transverse energy absorption monitoring element; the second transverse energy-sinking monitoring element is connected with the signal transmitting circuit in parallel;
one end of the first longitudinal monitoring identification unit is connected with the first longitudinal energy absorption monitoring element, and the other end of the first longitudinal monitoring identification unit is connected with the signal transmitting circuit; the first longitudinal monitoring identification unit is used for generating an identity identification number of the first longitudinal energy absorption monitoring element; the first longitudinal energy absorption monitoring element is connected with the signal transmitting circuit in parallel;
one end of the second longitudinal monitoring identification unit is connected with the second longitudinal energy absorption monitoring element, and the other end of the second longitudinal monitoring identification unit is connected with the signal transmitting circuit; the second longitudinal monitoring identification unit is used for generating an identity identification number of the second longitudinal energy absorption monitoring element; the second longitudinal energy absorption monitoring element is connected with the signal transmitting circuit in parallel;
one end of the first submerged longitudinal monitoring identification unit is connected with the first submerged longitudinal energy absorption monitoring element, and the other end of the first submerged longitudinal monitoring identification unit is connected with the signal transmitting circuit; the first submerged longitudinal monitoring identification unit is used for generating an identity identification number of the first submerged longitudinal energy absorption monitoring element; the first submerged longitudinal energy absorption monitoring element is connected with the signal transmitting circuit in parallel;
one end of the second underwater longitudinal monitoring identification unit is connected with the second underwater longitudinal energy absorption monitoring element, and the other end of the second underwater longitudinal monitoring identification unit is connected with the signal transmitting circuit; the second underwater longitudinal monitoring identification unit is used for generating an identity identification number of the second underwater longitudinal energy absorption monitoring element; the second submerged vertical energy absorption monitoring element is connected with the signal transmitting circuit in parallel.
Accordingly, based on the above embodiments, the present disclosure discloses a passive monitoring system embodiment, comprising:
the monitoring array is composed of at least one passive wireless piezoelectric sensor disclosed in any one of the previous embodiments, and is used for monitoring a longitudinal flow velocity component, a transverse flow velocity component and an internal flow velocity component of the liquid flow and sending out a monitoring signal.
As an optional implementation manner, in the foregoing embodiment, the passive monitoring system may further include:
the receiver is used for receiving the monitoring signals transmitted by the monitoring array;
the processor is used for processing the monitoring signals and extracting abnormal features;
and the analysis early warning device is used for analyzing and judging the abnormal features according to the pre-established standard features and giving early warning after determining the abnormality.
The monitoring array of the embodiment converts kinetic energy into electric energy by drawing the kinetic energy fluctuating transversely and longitudinally in the liquid, and stores the electric energy and transmits signals through the equivalent LC/RLC/RC/quartz oscillating circuit to provide energy for the piezoelectric sensor. The more severe the liquid is fluctuating, the more energy the sensor acquires and the greater the amplitude of the transmitted signal.
As an optional implementation manner, a positioning anchor is configured at a lower portion of at least one wireless passive sensor in the monitoring array, so that the wireless passive sensor in the monitoring array monitors in a preset area.
As an optional implementation manner, at least one wireless passive sensor in the monitoring array is connected to the bottom of the vehicle-mounted liquid container or the bottom of the water area through a rigid or flexible rope, so that the wireless passive sensor in the monitoring array monitors in a preset area.
In the above embodiments, the flexible piezoelectric material generates the voltage difference based on the deformation, and the larger the deformation is, the larger the voltage difference is. The piezoelectric transduction device is connected with the LC/RLC/RC/quartz circuit in parallel, and when the piezoelectric transduction device generates a voltage difference, the LC/RLC/RC/quartz oscillation circuit is charged. The larger the liquid fluctuation, the larger the energy obtained by the piezoelectric sensor, and the farther the transmission energy of the piezoelectric sensor, the larger the amplitude.
In this embodiment, the passive wireless piezoelectric sensor who adopts is small, simple structure, and the cost is with low costs, can regard as disposable monitoring facilities, puts in to the liquid environment that is not convenient for change, or retrieve. Therefore, the passive monitoring system of the embodiment forms a monitoring array through a plurality of passive wireless piezoelectric sensors, completes the monitoring task in the complex environment in the liquid, and is low in cost, accurate and sustainable.
The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (10)
1. A passive wireless piezoelectric sensor, comprising: the system comprises an energy absorption monitoring component, a piezoelectric transducer and a wireless communication component; wherein:
the pumping energy monitoring assembly is used for pumping kinetic energy from any direction of the liquid and detecting the motion state of the liquid;
the piezoelectric energy conversion device is connected with the energy absorption monitoring assembly and the wireless communication assembly and is used for converting the kinetic energy into electric energy and outputting the electric energy;
the wireless communication component is used for receiving the electric energy and sending out the liquid motion state information detected by the energy absorption monitoring component as a wireless signal.
2. The passive wireless piezoelectric sensor of claim 1, wherein the swamping energy monitoring component further comprises: a connection ball, a transverse energy absorption monitoring element, a longitudinal energy absorption monitoring element and an underwater energy absorption monitoring element; the transverse energy absorption monitoring element, the longitudinal energy absorption monitoring element and the submerged energy absorption monitoring element are respectively connected with the connecting ball body; wherein:
the transverse energy pumping monitoring element is arranged vertically to the horizontal direction of the liquid level, generates bending deformation along with the horizontal flow of the liquid, is used for pumping the kinetic energy of the liquid flowing in the horizontal direction, and monitors the flow speed and the direction of the liquid flowing in the horizontal direction;
the longitudinal energy absorption monitoring element is arranged in parallel to the horizontal direction of the liquid level, generates bending deformation along with the up-and-down flow of the liquid, is used for absorbing the kinetic energy of the liquid flowing in the vertical direction and monitoring the flow speed and the direction of the liquid flowing in the vertical direction;
the submerged energy-absorbing monitoring element is longitudinally arranged in the liquid and used for absorbing the kinetic energy of the flowing inside the liquid and monitoring the flow speed and the flow direction of the inside of the liquid.
3. The passive wireless piezoelectric sensor of claim 2, wherein:
the lateral drain energy monitoring device further comprises: a first lateral drain energy monitoring element and a second lateral drain energy monitoring element, the first lateral drain energy monitoring element and the second lateral drain energy monitoring element being disposed at an angle in a same plane; and/or the presence of a gas in the gas,
the vertical pumping energy monitoring element further comprises: the first longitudinal energy pumping monitoring element and the second longitudinal energy pumping monitoring element are arranged in the same plane at an angle; and/or the presence of a gas in the gas,
the submerged energy monitoring element further comprises: the device comprises a first submerged longitudinal energy absorption monitoring element and a second submerged longitudinal energy absorption monitoring element, wherein the plane of the first submerged longitudinal energy absorption monitoring element and the plane of the second submerged longitudinal energy absorption monitoring element are arranged at an angle.
4. A passive wireless piezoelectric sensor according to claim 2 or 3, wherein:
the transverse energy absorption monitoring element is in the shape of an energy absorption rod or an energy absorption sheet, wherein a rod body of the energy absorption rod is made of flexible piezoelectric materials; and/or the presence of a gas in the gas,
the longitudinal energy absorption monitoring element is in the shape of an energy absorption rod or an energy absorption sheet, wherein a rod body of the energy absorption rod is made of flexible piezoelectric materials; and/or the presence of a gas in the gas,
the underwater energy absorption monitoring element is in the shape of an energy absorption rod or an energy absorption sheet, wherein a rod body of the energy absorption rod is made of flexible piezoelectric materials.
5. The passive wireless piezoelectric sensor of claim 4, wherein:
the flexible piezoelectric material is rubber or plastic, and generates a voltage difference based on deformation caused by liquid flow; and/or the tail end of the rod body is provided with a counterweight; and/or the presence of a gas in the gas,
the wireless communication assembly further comprises: the monitoring device comprises a monitoring identification unit, a signal transmitting circuit and an antenna; the monitoring identification unit is connected with the signal transmitting circuit and the antenna and used for determining an identity of the pumping energy monitoring assembly correspondingly connected with the monitoring identification unit, and the identity is used for determining the flowing direction of the liquid.
6. The passive wireless piezoelectric sensor of claim 5, wherein the monitoring identification unit further comprises at least one of:
a first lateral monitoring identification unit, one end of which is connected with the first lateral energy absorption monitoring element, and the other end of which is connected with the signal transmitting circuit; the first lateral monitoring identification unit is used for generating an identification number of the first lateral pumping monitoring element; the first transverse energy-sinking monitoring element is connected with the signal transmitting circuit in parallel;
a second transverse monitoring identification unit, one end of which is connected with the second transverse energy absorption monitoring element and the other end is connected with the signal transmitting circuit; the second lateral monitoring identification unit is used for generating an identification number of the second lateral pumping monitoring element; the second transverse energy-sinking monitoring element is connected with the signal transmitting circuit in parallel;
a first longitudinal monitoring identification unit, one end of which is connected with the first longitudinal energy absorption monitoring element, and the other end of which is connected with the signal transmitting circuit; the first longitudinal monitoring identification unit is used for generating an identification number of the first longitudinal pumping monitoring element; the first longitudinal energy sinking monitoring element is connected with the signal transmitting circuit in parallel;
a second longitudinal monitoring identification unit, one end of which is connected with the second longitudinal energy absorption monitoring element and the other end of which is connected with the signal transmitting circuit; the second longitudinal monitoring identification unit is used for generating an identification number of the second longitudinal pumping monitoring element; the second longitudinal energy sinking monitoring element is connected with the signal transmitting circuit in parallel;
one end of the first submerged longitudinal monitoring identification unit is connected with the first submerged longitudinal energy absorption monitoring element, and the other end of the first submerged longitudinal monitoring identification unit is connected with the signal transmitting circuit; the first submerged longitudinal monitoring identification unit is used for generating an identity identification number of the first submerged longitudinal energy absorption monitoring element; the first submerged longitudinal energy absorption monitoring element is connected with the signal transmitting circuit in parallel;
one end of the second underwater longitudinal monitoring identification unit is connected with the second underwater longitudinal energy absorption monitoring element, and the other end of the second underwater longitudinal monitoring identification unit is connected with the signal transmitting circuit; the second underwater longitudinal monitoring identification unit is used for generating an identity identification number of the second underwater longitudinal energy absorption monitoring element; the second submerged longitudinal energy absorption monitoring element is connected with the signal transmitting circuit in parallel.
7. The passive wireless piezoelectric sensor of claim 6, wherein:
the signal transmitting circuit and the antenna are LC/RLC/RC/quartz oscillators and are used for receiving and transmitting voltage difference signals generated by the piezoelectric transducer; and/or
The connecting ball body is provided with an accommodating rod body, the accommodating rod body is communicated with the connecting ball body, and an accommodating space for accommodating the signal transmitting circuit and the antenna is formed in the accommodating rod body and the connecting ball body; in the working process of the passive wireless piezoelectric sensor, the accommodating rod body is exposed out of the liquid level.
8. A passive monitoring system, comprising:
a monitoring array comprising at least one passive wireless piezoelectric transducer according to any one of claims 1 to 7 for monitoring a longitudinal flow velocity component, a lateral flow velocity component, and an internal flow velocity component of a liquid flow and transmitting a monitoring signal.
9. The passive monitoring system of claim 8, further comprising:
the receiver is used for receiving the monitoring signals transmitted by the monitoring array;
the processor is used for processing the monitoring signal and extracting abnormal features;
and the analysis early warning device is used for analyzing and judging the abnormal features according to the pre-established standard features and giving early warning after determining the abnormality.
10. The passive monitoring system of claim 8 or 9, wherein:
a positioning anchor is configured at the lower part of at least one wireless passive sensor in the monitoring array; and/or
At least one wireless passive sensor in the monitoring array is connected to the bottom of the vehicle-mounted liquid container or the bottom of the water area through a rigid or flexible rope.
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