CN114460248A - Self-driven wireless water quality detection system based on low-frequency water wave energy collector - Google Patents
Self-driven wireless water quality detection system based on low-frequency water wave energy collector Download PDFInfo
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Abstract
The invention discloses a self-driven wireless water quality detection system based on a low-frequency water wave energy collector, which comprises: the device comprises a wireless sensor module, an energy management module, a low-frequency wave fluctuation energy collector, a floating plate and a shell, wherein the shell is U-shaped and comprises a first end face, a second end face and a semicircular end face, and the semicircular end face is fixed to the water bottom through a hauling rope or a ship anchor; the floating plate is fixed on the surfaces of the first end surface and the second end surface; the low-frequency wave fluctuation energy collector is embedded into the first end face and the second end face in a gear shape; the energy management module is embedded into the first end face and the second end face, is positioned at the upper end of the low-frequency water wave fluctuation energy collector and is connected with the output end of the low-frequency water wave fluctuation energy collector; the wireless sensor module is fixed on the upper sides of the first end face and the second end face, is connected with the output end of the energy management module, and forms a sealing structure with the shell. The system can realize wireless acquisition of information such as water quality, temperature and the like under the driving of water wave fluctuation energy without replacing batteries.
Description
Technical Field
The invention relates to the technical field of water quality detection, in particular to a self-driven wireless water quality detection system based on a low-frequency water wave energy collector.
Background
The wireless water quality sensor network can detect water quality information of a water area comprehensively by distributing a large number of water quality sensor nodes in the water area to be detected, so that the wireless sensor system applied to the field of water quality monitoring has the characteristics of wide distribution range and large number of nodes, and the distributed positions of the nodes are often areas far away from the shore, so that the wireless water quality sensor nodes are difficult to maintain manually after being deployed. The traditional wireless water quality monitoring sensor is usually driven by a battery, the service life of the traditional wireless water quality monitoring sensor is very limited, the battery needs to be frequently and manually replaced for maintenance, and the problem that the wireless water quality sensor cannot be applied on a large scale due to the fact that the wireless water quality monitoring sensor is difficult to maintain for a wireless water quality sensing network which is wide in distribution and large in quantity. Therefore, a self-driven wireless water quality sensor node which can collect the wave energy of the monitored water area in real time and can realize maintenance-free in a smaller packaging volume is urgently needed.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the invention aims to provide a self-driven wireless water quality detection system based on a low-frequency water wave energy collector.
In order to achieve the above object, an embodiment of the present invention provides a self-driven wireless water quality detection system based on a low-frequency water wave energy collector, including: the device comprises a wireless sensor module, an energy management module, a low-frequency wave fluctuation energy collector, a floating plate and a shell, wherein the shell is U-shaped and comprises a first end face, a second end face and a semicircular end face, and the semicircular end face is fixed to the water bottom through a hauling rope or a ship anchor; the floating plate is fixed on the surfaces of the first end surface and the second end surface; the low-frequency wave fluctuation energy collector is embedded into the first end face and the second end face in a gear shape; the energy management module is embedded into the first end face and the second end face, is positioned at the upper end of the low-frequency wave fluctuation energy collector and is connected with the output end of the low-frequency wave fluctuation energy collector; the wireless sensor module is fixed on the upper sides of the first end face and the second end face, is connected with the output end of the energy management module, and forms a sealing structure with the shell.
The self-driven wireless water quality detection system based on the low-frequency water wave energy collector, disclosed by the embodiment of the invention, realizes the self-driven wireless water quality detection system by collecting the wave energy of the water waves in the water area to be detected, can realize the wireless acquisition of information such as water quality, temperature and the like under the driving of the wave energy, does not need to replace batteries, and solves the problems of limited battery capacity and low service life of the traditional wireless water quality sensor.
In addition, the self-driven wireless water quality detection system based on the low-frequency wave energy collector according to the above embodiment of the invention may also have the following additional technical features:
further, in one embodiment of the present invention, the floating plate is used for increasing buoyancy, so that the housing, the wireless sensor module, the energy management module and the low-frequency wave fluctuation energy collector float on the water surface.
Further, in an embodiment of the present invention, the low-frequency wave energy collector is configured to collect the vibrational mechanical energy generated by wave fluctuation and convert the vibrational mechanical energy into ac power.
Further, in an embodiment of the present invention, the low-frequency water wave energy collector includes a left coil support plate, a left coil set, a left frame, an eccentric pendulum, a right frame, a right coil set, and a right coil support plate, wherein the left coil set is fixed to the left coil support plate by an adhesive, the left coil set includes 12 coils with the same winding direction, and two ends of each coil are welded into the left coil support plate; the inner part of the left coil supporting plate is wired in advance, adjacent coils are connected in series in opposite directions and output through a pin header with two ports; the left coil support plate is fixed to the left frame by gluing or bolts; the right coil group is fixed on the right coil support plate through glue, the right coil group comprises 12 coils with the same winding direction, and two ends of each coil are connected into the right coil support plate through welding; the inside of the right coil supporting plate is wired in advance, adjacent coils are connected in series in opposite directions and output through a pin header with two ports; the right coil support plate is fixed to the right frame by gluing or bolts; the left side frame with right side frame both sides central point puts a fixed low damping bearing respectively, the left side frame with the right side frame passes through the bolt will the eccentric pendulum presss from both sides at the center, and passes through the left side frame with right side frame spacing post all around guarantees the axis of eccentric pendulum aligns, wherein, the eccentric pendulum includes 6 magnetic poles, and adjacent magnetic pole opposite direction, and the direction and the axis direction of every magnetic pole are parallel, with the both sides formation alternating magnetic field of eccentric pendulum.
Further, in an embodiment of the present invention, the energy management module is configured to convert the random ac power in the low-frequency wave energy collector into a stable dc power.
Further, in an embodiment of the present invention, the energy management module includes a bridge rectifier circuit, a super capacitor voltage dividing network, a voltage boosting and stabilizing circuit, a voltage boosting circuit voltage dividing network, a voltage reducing and stabilizing circuit, a hysteresis comparator and a load switch, wherein an output terminal of the bridge rectifier circuit is electrically connected to an input terminal of the super capacitor, an output terminal of the super capacitor is electrically connected to an input terminal of the super capacitor voltage dividing network and an input terminal of the voltage boosting and stabilizing circuit, an output terminal of the voltage boosting and stabilizing circuit is electrically connected to an input terminal of the voltage boosting circuit voltage dividing network, an input terminal of the voltage reducing and stabilizing circuit and an input terminal of the load switch, an output terminal of the super capacitor voltage dividing network, an output terminal of the voltage boosting circuit voltage dividing network and an output terminal of the voltage reducing and stabilizing circuit are electrically connected to an input terminal of the hysteresis comparator, the output end of the hysteresis comparator is electrically connected with the input end of the load switch, and the control end of the load switch is electrically connected with the input end of the wireless sensor module.
Further, in an embodiment of the present invention, the ac signal output by the low-frequency water wave energy collector is connected to the bridge rectifier circuit to rectify the ac signal into a half-wave signal, and the energy is stored by the super capacitor; the super capacitor provides energy for the voltage boosting and stabilizing circuit, and provides energy for the voltage reducing and stabilizing circuit after the voltage boosting and stabilizing circuit is started, and the voltage reducing and stabilizing circuit provides energy for the hysteresis comparator; the input end of the hysteresis comparison is respectively connected to the output levels of the voltage-dividing network of the booster circuit and the voltage-dividing network of the super capacitor, and is used for comparing and outputting a signal to drive the control end of the load switch; the load switch controls the voltage boosting and stabilizing circuit to provide direct current electric energy for the wireless sensor module through on-off control.
Further, in an embodiment of the present invention, the wireless sensor module is driven by the energy management module to collect temperature information and water quality information of a preset water area, and wirelessly transmit the temperature information and the water quality information to the upper computer.
Further, in an embodiment of the present invention, the wireless sensor module includes a wireless sensor unit, a temperature sensor, a central controller, a voltage sampling circuit, a voltage inverter circuit, a water quality sensor driving circuit, and a conductivity test probe, wherein an output end of the voltage inverter circuit is electrically connected to an input end of the water quality sensor driving circuit, an output end of the water quality sensor driving circuit is electrically connected to an input end of the conductivity test probe, an output end of the conductivity test probe is electrically connected to an input end of the voltage sampling circuit, an output end of the voltage sampling circuit is electrically connected to an input end of the central controller, an output end of the temperature sensor is connected to an input end of the central controller through an IIC bus, and output ends of the central controller are respectively connected to the wireless sensor unit and the water quality sensor driving circuit through a UART bus, the wireless sensor unit is in wireless connection with the upper computer.
Further, in an embodiment of the present invention, a direct current power is input into the wireless sensor module to provide power for internal components, and the voltage inverting circuit outputs an inverted direct current power to provide a bipolar direct current power for the water quality sensor driving circuit; the water quality sensor driving circuit provides a driving signal for the conductivity test probe, and the conductivity signal generated by the conductivity test probe is converted into a digital signal through the voltage sampling circuit and is transmitted to the central controller; the central control drives the temperature sensor to sample the temperature; the central controller transmits temperature information and water quality information to the wireless sensor unit through a UART bus, and the wireless sensor unit is used for wirelessly transmitting data to the upper computer.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of a self-driven wireless water quality detection system based on a low-frequency wave energy collector according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a low frequency wave energy collector according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the structure of an energy management module of one embodiment of the present invention;
fig. 4 is a schematic structural diagram of a wireless water quality sensor module according to an embodiment of the invention;
fig. 5 is a flow chart of the operation of the self-driven wireless water quality monitoring system according to an embodiment of the invention.
Description of reference numerals:
1-wireless sensor module, 11-wireless communication unit, 12-temperature sensor, 13-central controller, 14-voltage sampling circuit, 15-voltage inverter circuit, 16-water quality sensor drive circuit, 17-conductivity test probe, 2-energy management module, 21-bridge rectifier circuit, 22-super capacitor, 23-super capacitor voltage division network, 24-voltage boosting voltage stabilizing circuit, 25-voltage boosting circuit voltage division network, 26-voltage reducing voltage stabilizing circuit, 27-hysteresis comparator, 28-load switch, 3-low frequency water wave fluctuation energy collector, 31-left side coil support plate, 32-left side coil group, 33-left side frame, 34-eccentric pendulum, 35-right side frame, 36-right side coil group, 34-left side coil group, 37-right coil support plate, 4-floating plate and 5-shell.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The self-driven wireless water quality detection system based on the low-frequency wave energy collector provided by the embodiment of the invention is described below with reference to the attached drawings.
Fig. 1 is a schematic structural diagram of a self-driven wireless water quality detection system based on a low-frequency wave energy collector according to an embodiment of the invention.
As shown in fig. 2, the system includes: the device comprises a wireless sensor module 1, an energy management module 2, a low-frequency water wave fluctuation energy collector 3, a floating plate 4 and a shell 5.
Wherein, the shell is the U type and includes first terminal surface, second terminal surface and semicircle terminal surface, and the semicircle terminal surface passes through haulage rope or ship anchor and is fixed in the bottom. The floating plates are fixed on the surfaces of the first end face and the second end face and used for increasing buoyancy, so that the shell, the wireless sensor module 1, the energy management module 2 and the low-frequency wave fluctuation energy collector 3 float on the water surface. The low-frequency wave energy collector 3 is embedded into the first end face and the second end face in a gear shape. The energy management module 2 is embedded in the first end face and the second end face, is positioned at the upper end of the low-frequency water wave fluctuation energy collector 3, is connected with the output end of the low-frequency water wave fluctuation energy collector 3, and is used for collecting vibration mechanical energy generated by water wave fluctuation and converting the vibration mechanical energy into alternating current electric energy. The wireless sensor module 1 is fixed on the upper sides of the first end face and the second end face, is connected with the output end of the energy management module 2, forms a sealing structure with the shell, and is used for collecting temperature information and water quality information of a preset water area under the driving of the energy management module 2 and wirelessly sending the temperature information and the water quality information to an upper computer.
Further, as shown in fig. 2, in one embodiment of the present invention, the low frequency water wave energy collector 3 comprises a left coil support plate 31, a left coil group 32, a left frame 33, an eccentric pendulum 34, a right frame 35, a right coil group 36 and a right coil support plate 37, wherein,
the left coil assembly 32 is fixed on the left coil support plate 31 through glue, the left coil assembly 32 comprises 12 coils with the same winding direction, and two ends of each coil are connected into the left coil support plate 31 through welding;
the inner part of the left coil support plate 31 is wired in advance, adjacent coils are connected in series in opposite directions and output through a pin header with two ports;
the left coil support plate 31 is fixed to the left frame 33 by gluing or bolting;
the right coil assembly 36 is fixed on the right coil support plate 37 through glue, the right coil assembly 36 comprises 12 coils with the same winding direction, and two ends of each coil are connected into the right coil support plate 37 through welding;
the inside of the right coil supporting plate 37 is wired in advance, adjacent coils are connected in series in opposite directions and output through a pin header with two ports;
the right coil support plate 37 is fixed to the right frame 35 by gluing or bolting;
two low-damping bearings are respectively fixed at the center positions of two sides of the left side frame 33 and the right side frame 35, the left side frame 33 and the right side frame 35 clamp the eccentric pendulum at the center through bolts, and the alignment of the axes of the eccentric pendulum 34 is ensured through the limiting columns at the periphery of the left side frame 33 and the right side frame 35, wherein the eccentric pendulum 34 comprises 6 magnetic poles, the directions of the adjacent magnetic poles are opposite, and the direction of each magnetic pole is parallel to the direction of the axis so as to form alternating magnetic fields at two sides of the eccentric pendulum 34.
Further, as shown in fig. 3, in an embodiment of the present invention, the energy management module 2 includes a bridge rectifier circuit 21, a super capacitor 22, a super capacitor voltage dividing network 23, a voltage boost stabilizing circuit 24, a voltage boost circuit voltage dividing network 25, a voltage buck stabilizing circuit 26, a hysteresis comparator 27 and a load switch 28, wherein an output terminal of the bridge rectifier circuit 21 is electrically connected to an input terminal of the super capacitor 22, an output terminal of the super capacitor 22 is electrically connected to an input terminal of the super capacitor voltage dividing network 23 and an input terminal of the voltage boost stabilizing circuit 24, an output terminal of the voltage boost stabilizing circuit 24 is electrically connected to an input terminal of the voltage boost circuit voltage dividing network 25, an input terminal of the voltage buck stabilizing circuit 26 and an input terminal of the load switch 28, an output terminal of the super capacitor voltage dividing network 23, an output terminal of the voltage boost circuit voltage dividing network 25 and an output terminal of the buck stabilizing circuit 26 are electrically connected to an input terminal of the hysteresis comparator 27, the output end of the hysteresis comparator 27 is electrically connected with the input end of the load switch 28, and the control end of the load switch 28 is electrically connected with the input end of the wireless sensor module 1.
Specifically, in the embodiment of the present invention, the ac signal output by the low-frequency water wave fluctuation energy collector 3 is connected to the bridge rectifier circuit 21 to rectify the ac signal into a half-wave signal, and the energy is stored by the super capacitor 22;
the super capacitor 22 provides energy for the boost voltage stabilizing circuit 24, and provides energy for the buck voltage stabilizing circuit 26 after the boost voltage stabilizing circuit 24 is started, and the buck voltage stabilizing circuit 26 provides energy for the hysteresis comparator 27; the input end of the hysteresis comparison is respectively connected with the level output by the voltage-dividing network 25 of the booster circuit and the voltage-dividing network 23 of the super capacitor, and the input end of the hysteresis comparison is compared with the level output by the voltage-dividing network 23 of the super capacitor, and the output signal drives the control end of the load switch 28; the load switch 28 provides direct current power to the wireless sensor module 1 through the on-off control boost voltage stabilizing circuit 24.
Further, as shown in fig. 4, in an embodiment of the present invention, the wireless sensor module 1 includes a wireless communication unit 11, a temperature sensor 12, a central controller 13, a voltage sampling circuit 14, a voltage inverting circuit 15, a water quality sensor driving circuit 16 and a conductivity test probe 17, wherein an output terminal of the voltage inverting circuit 15 is electrically connected to an input terminal of the water quality sensor driving circuit 16, an output terminal of the water quality sensor driving circuit 16 is electrically connected to an input terminal of the conductivity test probe 17, an output terminal of the conductivity test probe 17 is electrically connected to an input terminal of the voltage sampling circuit 14, an output terminal of the voltage sampling circuit 14 is electrically connected to an input terminal of the central controller 13, an output terminal of the temperature sensor 12 is connected to an input terminal of the central controller 13 through an IIC bus, output terminals of the central controller 13 are respectively connected to the water quality sensor driving circuit 16 through a UART bus wireless sensor unit, the wireless sensor unit is in wireless connection with the upper computer.
Specifically, the wireless sensor module 1 is used for inputting direct current power to provide power for internal components, outputting inverted direct current power through the voltage inverting circuit 15, and providing a bipolar direct current power supply for the water quality sensor driving circuit 16; the water quality sensor driving circuit 16 provides a driving signal for the conductivity test probe 17, and the conductivity signal generated by the conductivity test probe 17 is converted into a digital signal through the voltage sampling circuit 14 and is transmitted to the central controller 13; the central control drives the temperature sensor 12 to sample the temperature; the central controller 13 transmits the temperature information and the water quality information to the wireless communication unit 11 through the UART bus, and then wirelessly transmits the data to the upper computer by using the wireless communication unit 11.
The working principle of the self-driven wireless water quality detection system based on the low-frequency water wave energy collector provided by the embodiment of the invention is further explained below.
In actual work, the embodiment of the invention is fixed in a water area to be monitored through a traction rope, an anchor and the like, when water waves pass through the self-driven wireless water quality monitoring system, the floating plate 4 drives the whole system to generate swing motion, and the low-frequency water wave fluctuation energy collector 3 is driven to generate swing motion. Since the eccentric pendulum 34 is connected to the left side frame 33 and the right side frame 35 through two low damping bearings, respectively, the eccentric pendulum 34 can freely swing between the left side frame 33 and the right side frame 35. And because the left coil group 32 and the right coil group 36 are fixed on the left frame 33 and the right frame 35 through the left coil support plate 31 and the right coil support plate 37, respectively, when the low-frequency water wave energy collector 3 swings, the eccentric pendulum 34 and the left coil group 32 and the right coil group 36 generate relative rotation movement, so that the magnetic flux of the coils in the left coil group 32 and the right coil group 36 changes, and alternating induced voltage is generated. The adjacent coils are opposite in connecting direction, the adjacent magnetic poles of the eccentric pendulums 34 are also opposite in direction, so that the voltage generated by each coil is always in the same phase, and therefore the coils are connected in series to generate higher voltage.
Under the driving of water wave vibration, the low-frequency water wave fluctuation energy collector 3 generates alternating current electric energy, but load elements such as wireless sensors and the like generally need stable direct current power supply driving, and the instantaneous power required by high-energy-consumption operations such as wireless communication, data processing and the like is high, so that the low-frequency water wave fluctuation energy collector 3 cannot directly provide enough energy for the high-energy-consumption operations. Therefore, the energy management module 2 is introduced to solve the problem that the output power of the energy collector cannot meet the requirements of high energy consumption and stable direct current driving of the load. Alternating current electric energy generated by the low-frequency water wave fluctuation energy collector 3 is rectified into a half-wave signal through the bridge rectifier circuit 21 to charge the super capacitor 22. In order to reduce the threshold loss caused by diode voltage drop, the bridge rectifier circuit 21 should use a diode with low voltage drop as the rectifier element. When the super capacitor 22 is charged to the start threshold of the voltage boost stabilizing circuit 24, the voltage boost stabilizing circuit 24 starts to work, and the voltage of the super capacitor is converted into a stable 3.3V level to provide electric energy for the voltage reduction stabilizing circuit 26. The voltage-reducing stabilizing circuit 26 outputs 1.8V level after starting to provide energy for the hysteresis comparator 27. The non-inverting and inverting input terminals of the hysteresis comparator are respectively connected with voltage signals generated by the super capacitor voltage dividing network 23 and the booster circuit voltage dividing network 25 for comparison. The booster circuit voltage-dividing network 25 is directly driven by the output end of the booster voltage-stabilizing circuit 24 to generate stable reference voltage; the super capacitor voltage dividing network 23 is driven by the super capacitor 22 to generate an energy storage voltage monitoring signal. Because the voltage boosting stabilizing circuit 24 is started before the voltage reducing stabilizing circuit 26, the hysteresis comparator can be powered on and started after the reference voltage signal and the voltage monitoring signal are stably established, and the situation that the load switch 28 is started in advance due to the fact that the hysteresis comparator 27 generates wrong output signals in a cold starting stage of the system, and the system is in self-locking is avoided. Due to the existence of the hysteresis voltage interval, when the voltage monitoring signal of the super capacitor 22 exceeds the forward hysteresis threshold of the reference voltage, the hysteresis comparator 27 outputs a high level, the load switch 28 is turned on to provide a stable 3.3V driving level for the wireless sensor system 1, the energy stored in the super capacitor 22 is quickly consumed, and the voltage of the super capacitor 22 is reduced; when the voltage monitoring signal of the super capacitor 22 is lower than the negative hysteresis threshold of the reference voltage, the hysteresis comparator 27 outputs a low level, the load switch 28 is turned off, and the super capacitor 22 can continue to accumulate energy under the driving of the low-frequency water wave fluctuation energy collector 3. By setting the positive and negative hysteresis thresholds, the discharge interval of the supercapacitor 22 can be adjusted to adapt to various load operating frequencies and water wave vibration environments.
After the energy management module 2 supplies energy to the wireless sensor module 1, the wireless sensor module 1 starts to work, and the work flow chart is shown in fig. 5. After the central processing unit 13 is powered on, the initialization operation is performed on the internal hardware such as the SPI bus controller, the IIC bus controller, the timer, and the system clock, and the initialization operation is performed on the wireless communication unit 11. In the embodiment of the present invention, the central controller 13 should select a processor with ultra-low power consumption characteristics, and the wireless communication unit 11 should select a low power consumption wireless communication unit such as a wireless local area network, a ZigBee, a wireless communication network, and the like according to a communication distance required in an actual application scenario. Because the components such as the temperature sensor 12, the conductivity test probe 17, the wireless communication module 11 and the like need a certain initialization time to enter a stable working state, in order to reduce the power consumption of the system, the timer of the central controller 13 is started in the process, all hardware except the timer is closed and enters a sleep state, and the central controller 13 is waken up to enter a normal working mode after the timing is finished. At this time, the initialization process of all the peripherals is completed, and the system enters a data acquisition stage. The water quality information in the embodiment of the invention is realized by collecting the conductivity of the water area to be detected, and the water quality sensor driving circuit 16 generates an alternating current driving signal to enable the water body between the electrodes of the conductivity testing probe 17 to generate a voltage difference, so that the voltage difference is detected by the voltage sampling circuit 14. Because the voltage collected by the voltage sampling circuit 14 is different due to the change of the conductivity of the water body to be measured, the water quality information of the water body to be measured can be obtained by converting the sampling voltage according to the fitting model. Meanwhile, the central controller 13 drives the temperature sensor 12 to acquire the temperature information of the water area to be measured through the IIC bus, reads the conductivity information of the water area to be measured through the SPI bus, and can obtain more accurate water quality and temperature information of the water area to be measured through a calculation model with temperature compensation. After the calculation is finished, the central controller 13 sends the result to the wireless communication unit 11 through the UART bus, and the result is wirelessly transmitted to an upper computer through a wireless communication protocol, so that the remote monitoring of the water quality information is realized. After the wireless transmission of the information is completed, the energy stored in the super capacitor 22 in the energy management system 2 is consumed, the load switch 28 is turned off, the energy supply to the wireless sensor module 1 is turned on after the energy is accumulated to the forward hysteresis threshold, and a new working cycle is started, so that the wireless sensor module 1 can work unattended for a long time without charging the battery under the driving of the water wave fluctuation energy.
In summary, the self-driven wireless water quality detection system based on the low-frequency water wave energy collector provided by the embodiment of the invention provides energy for the wireless sensor module through the low-frequency water wave energy collector, and has the advantages of no maintenance, long service life, no extra energy consumption and the like in practical application; the super capacitor is adopted as the energy storage device, so that the problems of low cycle life, complex charge and discharge management circuit, low efficiency and the like when a lithium battery is adopted as the energy storage device are solved; the energy management system takes the voltage boosting and stabilizing circuit as a main output power supply, so that the energy of the super capacitor in a low-voltage interval can be effectively utilized, the charging efficiency of the low-frequency wave fluctuation energy collector on the super capacitor can be improved, the charging dead zone caused by voltage difference is reduced, and the self-discharge rate of the super capacitor is lower during low-voltage energy storage, so that the energy loss caused by charge leakage of the super capacitor is reduced, and the energy utilization efficiency is further improved; finally, the wireless sensor system, the energy management system and the low-frequency wave fluctuation energy collector are integrally designed, can be packaged in a floating shell together in a stacking mode, have the advantages of small size, light weight, convenience in deployment and the like, and have higher practicability.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A self-driven wireless water quality detection system based on a low-frequency water wave energy collector is characterized by comprising: a wireless sensor module, an energy management module, a low-frequency wave energy collector, a floating plate and a shell, wherein,
the shell is U-shaped and comprises a first end face, a second end face and a semicircular end face, and the semicircular end face is fixed at the water bottom through a hauling cable or a ship anchor;
the floating plate is fixed on the surfaces of the first end surface and the second end surface;
the low-frequency wave fluctuation energy collector is embedded into the first end face and the second end face in a gear shape;
the energy management module is embedded into the first end face and the second end face, is positioned at the upper end of the low-frequency wave fluctuation energy collector and is connected with the output end of the low-frequency wave fluctuation energy collector;
the wireless sensor module is fixed on the upper sides of the first end face and the second end face, is connected with the output end of the energy management module, and forms a sealing structure with the shell.
2. The self-driven wireless water quality detection system based on the low-frequency wave energy collector of claim 1, wherein the floating plate is used for increasing buoyancy, so that the housing, the wireless sensor module, the energy management module and the low-frequency wave energy collector float on the water surface.
3. The self-driven wireless water quality detection system based on the low-frequency wave energy collector as recited in claim 1, wherein the low-frequency wave energy collector is used for collecting the vibrating mechanical energy generated by wave fluctuation and converting the vibrating mechanical energy into alternating current energy.
4. The self-driven wireless water quality detection system based on the low-frequency water wave energy collector of claim 3, wherein the low-frequency water wave energy collector comprises a left coil support plate, a left coil set, a left frame, an eccentric pendulum, a right frame, a right coil set and a right coil support plate, wherein,
the left coil assembly is fixed on the left coil support plate through glue, the left coil assembly comprises 12 coils with the same winding direction, and two ends of each coil are connected into the left coil support plate through welding;
the inner part of the left coil supporting plate is wired in advance, adjacent coils are connected in series in opposite directions and output through a pin header with two ports;
the left coil support plate is fixed to the left frame by gluing or bolts;
the right coil is fixed on the right coil support plate through glue, the right coil group comprises 12 coils with the same winding direction, and two ends of each coil are connected into the right coil support plate through welding;
the inside of the right coil supporting plate is wired in advance, adjacent coils are connected in series in opposite directions and output through a pin header with two ports;
the right coil support plate is fixed to the right frame by gluing or bolts;
the left side frame with right side frame both sides central point puts a fixed low damping bearing respectively, the left side frame with the right side frame passes through the bolt will the eccentric pendulum presss from both sides at the center, and passes through the left side frame with right side frame spacing post all around guarantees the axis of eccentric pendulum aligns, wherein, the eccentric pendulum includes 6 magnetic poles, and adjacent magnetic pole opposite direction, and the direction and the axis direction of every magnetic pole are parallel, with the both sides formation alternating magnetic field of eccentric pendulum.
5. The self-driven wireless water quality detection system based on the low-frequency water wave energy collector as recited in claim 1, wherein the energy management module is configured to convert random alternating current electric energy in the low-frequency water wave energy collector into stable direct current electric energy.
6. The self-driven wireless water quality detection system based on the low-frequency wave energy collector of claim 5, wherein the energy management module comprises a bridge rectifier circuit, a super capacitor voltage division network, a voltage boosting and stabilizing circuit, a voltage boosting and voltage dividing network, a voltage reducing and stabilizing circuit, a hysteresis comparator and a load switch,
the output end of the bridge rectifier circuit is electrically connected with the input end of the super capacitor, the output end of the super capacitor is electrically connected with the input end of the super capacitor voltage division network and the input end of the boost voltage stabilizing circuit respectively, the output end of the boost voltage stabilizing circuit is electrically connected with the input end of the boost circuit voltage division network, the input end of the buck voltage stabilizing circuit and the input end of the load switch respectively, the output end of the super capacitor voltage division network, the output end of the boost circuit voltage division network and the output end of the buck voltage stabilizing circuit are electrically connected with the input end of the hysteresis comparator, the output end of the hysteresis comparator is electrically connected with the input end of the load switch, and the control end of the load switch is electrically connected with the input end of the wireless sensor module.
7. The self-driven wireless water quality detection system based on the low-frequency wave energy collector of claim 6,
the alternating current signal output by the low-frequency water wave fluctuation energy collector is connected into the bridge rectifier circuit so as to rectify the alternating current signal into a half-wave signal and store energy through the super capacitor;
the super capacitor provides energy for the voltage boosting and stabilizing circuit, and provides energy for the voltage reducing and stabilizing circuit after the voltage boosting and stabilizing circuit is started, and the voltage reducing and stabilizing circuit provides energy for the hysteresis comparator;
the input end of the hysteresis comparison is respectively connected to the output levels of the voltage-dividing network of the booster circuit and the voltage-dividing network of the super capacitor, and is used for comparing and outputting a signal to drive the control end of the load switch;
the load switch controls the voltage boosting and stabilizing circuit to provide direct current electric energy for the wireless sensor module through on-off control.
8. The self-driven wireless water quality detection system based on the low-frequency wave energy collector as recited in claim 1, wherein the wireless sensor module is driven by the energy management module to collect temperature information and water quality information of a preset water area and wirelessly transmit the temperature information and water quality information to the upper computer.
9. The self-driven wireless water quality detection system based on the low-frequency water wave energy collector of claim 8, wherein the wireless sensor module comprises a wireless communication unit, a temperature sensor, a central controller, a voltage sampling circuit, a voltage inverting circuit, a water quality sensor driving circuit and a conductivity testing probe, wherein,
the output of voltage inverter circuit with quality of water sensor drive circuit's input electricity is connected, quality of water sensor drive circuit's output with the input electricity of conductivity test probe is connected, the output of conductivity test probe with the input electricity of voltage sampling circuit is connected, the output of voltage sampling circuit with central controller's input electricity is connected, temperature sensor's output pass through the IIC bus with central controller's input is connected, central controller's output passes through the UART bus respectively wireless sensor unit with quality of water sensor drive circuit connects, wireless sensor unit with host computer wireless connection.
10. The self-driven wireless water quality detection system based on the low-frequency wave energy collector as claimed in claim 9,
the direct current power is input into the wireless sensor module to provide power for internal components, and the inverted direct current power is output through the voltage inverting circuit to provide a bipolar direct current power supply for the water quality sensor driving circuit;
the water quality sensor driving circuit provides a driving signal for the conductivity test probe, and the conductivity signal generated by the conductivity test probe is converted into a digital signal through the voltage sampling circuit and is transmitted to the central controller;
the central control drives the temperature sensor to sample the temperature;
the central controller transmits temperature information and water quality information to the wireless communication unit through a UART bus, and the wireless communication unit is used for wirelessly transmitting data to the upper computer.
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