A self-powered flow sensor

Abstract

The application relates to the field of liquid flow measurement, and discloses a self-powered flow sensor, which is self-driven and does not need external power supply or battery power supply, thereby realizing continuous and stable work. In the self-powered flow sensor, a power capturing device is arranged in a cavity in a base body assembly, the power capturing device comprises a casing and a rotor arranged in the casing, the surface of the casing is provided with a second liquid inlet and a second liquid outlet, a baffle is arranged in the casing, the baffle separates the second liquid inlet and the second liquid outlet, the rotor comprises a disc and a ball shaft located at the center of the disc, and the disc performs swing rotary motion around the ball shaft under the drive of liquid; a power generation device is configured to operate under the drive of the rotor and output alternating current; a sensing device is configured to operate under the drive of the rotor and output a pulse signal; and a processing device is configured to rectify the alternating current output by the power generation device and convert the pulse signal generated by the sensing device into flow information of the liquid.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid flow measurement, in particular to a self-powered flow sensor. BACKGROUND

[0002] Flow monitoring has very important practical significance for industrial production, daily life and fluid transportation, and monitoring instruments are widely used in various pipelines and networks, such as urban water supply, agricultural irrigation, industrial transportation, oil exploitation, etc. However, some intelligent instruments currently need external power supply or battery power supply, which will affect the operation of the instrument when the external power supply fails to supply power or the battery power is insufficient, and it is difficult to ensure the continuous stability of the monitoring instrument. SUMMARY

[0003] The present application provides a self-powered flow sensor to solve the problem that intelligent instruments in the prior art need external power supply or battery power supply, are affected by the working state of the external power supply and the battery power, and are difficult to ensure continuous and stable operation.

[0004] The present application provides a self-powered flow sensor, which comprises a base assembly, a power capturing device, a power generating device, a sensing device and a processing device.

[0005] The base assembly is provided with a first liquid inlet, a first liquid outlet and a cavity communicating with the first liquid inlet and the first liquid outlet.

[0006] The power capturing device is arranged in the cavity and comprises a casing and a rotor arranged in the casing. The casing is provided with a second liquid inlet and a second liquid outlet on the surface, and a baffle is arranged in the casing. The baffle separates the second liquid inlet and the second liquid outlet. The rotor comprises a disc and a ball shaft arranged at the center of the disc. The disc is provided with an opening, and the baffle passes through the opening. The disc performs a swing rotation movement around the ball shaft under the drive of the liquid.

[0007] The power generating device is configured to operate under the drive of the rotor and output alternating current.

[0008] The sensing device is configured to operate under the drive of the rotor and generate a pulse signal.

[0009] The processing device is connected with the power generating device and the sensing device, and is configured to rectify the alternating current output by the power generating device and convert the pulse signal generated by the sensing device into flow information of the liquid.

[0010] In the above embodiment, the self-powered flow sensor is used in the working process, liquid passes through the casing of the energy capturing device, the rotor arranged in the casing is a disc-shaped rotor, which rotates under the driving of the liquid, and the disc rotates, the power generation device outputs alternating current, the alternating current can be rectified to power the electrical components, realizing self-driving, without external power supply or battery power supply, and can work continuously and stably; at the same time, the sensing device generates pulse signals, the number of pulse signals is positively correlated with the amplitude of the disc swing rotation, the pulse signals can be converted into liquid flow information, realizing flow monitoring.

[0011] Optionally, the ball shaft is a hollow structure, and the power generation device and / or the sensing device are arranged in the ball shaft.

[0012] Optionally, the energy capturing device further comprises a transmission assembly, an input end of the transmission assembly is located in the casing, and an output end of the transmission assembly is located outside the casing, the transmission assembly is configured to rotate under the driving of the rotor;

[0013] The power generation device is arranged at the output end of the transmission assembly and generates power under the driving of the transmission assembly, and / or the sensing device is arranged at the output end of the transmission assembly and generates pulse signals under the driving of the transmission assembly.

[0014] Optionally, a plurality of support plates are arranged in the ball shaft, and the plurality of support plates are arranged in layers and spaced along the central axis of the ball shaft.

[0015] The power generation device comprises a plurality of power generation units, the power generation units correspond to the support plates one by one, the power generation unit comprises two electrode blocks and a plurality of first friction small balls, the two electrode blocks are arranged on the surface of the support plate; during rotation of the rotor, the plurality of first friction small balls move back and forth between the two electrode blocks, and the two electrode blocks output alternating current.

[0016] Alternatively, the power generation device comprises a plurality of power generation units, the power generation units correspond to the support plates one by one, the power generation unit comprises a magnetic column roller and a first coil winding, the magnetic column roller is arranged on the surface of the support plate, and the first coil winding is arranged above the support plate, during rotation of the rotor, the magnetic column roller moves in a circle relative to the center of the support plate on the surface of the support plate, and the first coil winding cuts the magnetic induction lines to generate current.

[0017] Optionally, the power generation device comprises a first rotating part, a first diaphragm, a first fixed part, and a first electrode assembly.

[0018] The first rotating part is connected with the output end of the transmission assembly, and the first diaphragm is arranged on the first rotating part.

[0019] The first fixed part is connected with the base assembly, the first electrode assembly is arranged on the first fixed part, the first electrode assembly comprises a first electrode block and a second electrode block, the first electrode block and the second electrode block are arranged at intervals in the circumferential direction, and the first electrode block and the second electrode block are respectively connected with an external circuit; during the alternation of the first membrane and the contact of the first electrode block and the second electrode block, the first electrode block and the second electrode block output alternating current to the outside.

[0020] Optionally, the number of the first electrode assemblies is three, and the three first electrode assemblies are arranged in a phase difference layer-by-layer mode to form a three-phase coupling electrode group.

[0021] Optionally, the power generation device comprises a rotating base, a magnet, a fixed base and a second coil winding.

[0022] The rotating base is connected with the output end of the transmission assembly, and the magnet is arranged on the rotating base.

[0023] The fixed base is connected with the base assembly, and the second coil winding is arranged on the fixed base; during the rotation of the magnet, the second coil winding cuts the magnetic induction lines to generate induced current.

[0024] Optionally, the number of the second coil windings is multiple, and the multiple second coil windings form at least one three-phase coil winding, and the three-phase coil winding comprises three second coil windings which are uniformly distributed along the circumference.

[0025] Optionally, the sensing device comprises a second electrode assembly and a second friction ball, the ball shaft is provided with an annular groove, the second electrode assembly is arranged on the bottom surface of the groove, the second electrode assembly comprises a third electrode block and a fourth electrode block, the third electrode block and the fourth electrode block are arranged at intervals in the circumferential direction, and the third electrode block and the fourth electrode block are respectively connected with an external circuit.

[0026] The second friction ball is arranged in the groove and rolls on the surface of the second electrode assembly along the groove, and during the alternation of the second friction ball and the contact of the third electrode block and the fourth electrode block, the third electrode block and the fourth electrode block output pulse signals to the outside.

[0027] Optionally, the number of the grooves is two, the grooves are oppositely arranged, and the second friction ball is arranged between the two grooves.

[0028] The number of the second electrode assemblies is two, and the two second electrode assemblies correspond to the two grooves one by one, and the arrangement order of the third electrode block and the fourth electrode block in the two second electrode assemblies is opposite.

[0029] Optionally, a support plate is arranged in the ball shaft, the sensing device comprises a roller and a third electrode assembly, and the roller is configured to make a circular motion on the surface of the support plate relative to the center of the support plate during the movement of the ball shaft.

[0030] The third electrode assembly is arranged on the surface of the support plate and comprises a fifth electrode block and a sixth electrode block, the fifth electrode block and the sixth electrode block are arranged at intervals in the circumferential direction, and the fifth electrode block and the sixth electrode block are respectively connected with an external circuit; during the alternation of the roller and the contact of the fifth electrode block and the sixth electrode block, the fifth electrode block and the sixth electrode block output pulse signals outward.

[0031] Optionally, the number of the third electrode assembly is three, and the three third electrode assemblies are arranged in a phase difference in the radial direction of the support plate.

[0032] Optionally, the sensing device comprises a second rotating part, a second diaphragm, a second fixed part and a fourth electrode assembly.

[0033] The second rotating part is connected with the output end of the transmission assembly, the second diaphragm is arranged on the second rotating part, and the second diaphragm carries an electric charge.

[0034] The second fixed part is connected with the base assembly, the fourth electrode assembly is arranged on the second fixed part and has a gap between the fourth electrode assembly and the second diaphragm, the fourth electrode assembly comprises a seventh electrode block and an eighth electrode block, the seventh electrode block and the eighth electrode block are arranged at intervals in the circumferential direction, and the seventh electrode block and the eighth electrode block are respectively connected with an external circuit; during the alternation of the second diaphragm passing through the seventh electrode block and the eighth electrode block, the seventh electrode block and the eighth electrode block output pulse signals outward.

[0035] Optionally, the sensing device comprises an inner ring, an outer ring, a ball, and a fifth electrode assembly.

[0036] The inner ring is connected with the output end of the transmission assembly.

[0037] The outer ring is fixed relative to the base assembly and is made of a ring structure of a high polymer material.

[0038] The ball is arranged between the inner ring and the outer ring.

[0039] The fifth electrode assembly is disposed on the outer wall surface of the outer ring and includes a ninth electrode block and a tenth electrode block. The ninth electrode block and the tenth electrode block are spaced apart circumferentially and are respectively connected to an external circuit. During the process of the ball alternately passing through the ninth electrode block and the tenth electrode block, the ninth electrode block and the tenth electrode block output pulse signals to the outside.

[0040] Optionally, the processing device includes a power management module, a processing module, a display module, and / or a communication module;

[0041] The power management module is connected to the power generation device and is used to convert the AC power output by the power generation device into DC power and supply power to the electrical components.

[0042] The processing module is used to convert the pulse signal into liquid flow information;

[0043] The display module is used to display the traffic information;

[0044] The communication module is used to send the traffic information to the terminal device. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of a self-powered flow sensor provided in an embodiment of the present invention;

[0046] Figure 2 for Figure 1 The diagram shown is a structural schematic of the base component in the self-powered flow sensor.

[0047] Figure 3 for Figure 1 The diagram shown is a schematic of the energy harvesting device in the self-powered flow sensor.

[0048] Figure 4 for Figure 1 The diagram shown is a schematic of the transmission assembly in the self-powered flow sensor.

[0049] Figure 5 for Figure 1 The diagram shown is a combination of the rotor and the generator in the self-powered flow sensor.

[0050] Figure 6 , Figure 7 for Figure 1 The diagram shown is a structural schematic of the sensing device in the self-powered flow sensor.

[0051] Figure 8 for Figure 7 The diagram shown is a schematic of the fourth electrode assembly in the sensing device after it has been unfolded.

[0052] Figure 9Another structural schematic view of a self-powered flow sensor provided by an embodiment of the present application is shown in FIG. 1B.

[0053] Figure 10 、 Figure 11 A structural schematic view of a power generation device of the self-powered flow sensor shown in FIG. 1A is shown in FIG. 2. Figure 9

[0054] A structural schematic view of a sensing device of the self-powered flow sensor shown in FIG. 1A is shown in FIG. 3. Figure 12 Figure 9 A structural schematic view of another self-powered flow sensor provided by an embodiment of the present application is shown in FIG. 4.

[0055] Figure 13 A structural schematic view of a power generation device of the self-powered flow sensor shown in FIG. 4 is shown in FIG. 5.

[0056] Figure 14 Figure 13 A combined schematic view of a rotor and a sensing device of the self-powered flow sensor shown in FIG. 4 is shown in FIG. 6.

[0057] Figure 15 A structural schematic view of a sensing device and a groove shown in FIG. 6 is shown in FIG. 7. Figure 13

[0058] A structural schematic view of another self-powered flow sensor provided by an embodiment of the present application is shown in FIG. 8. Figure 16 Figure 15 A structural schematic view of a third electrode assembly of the sensing device shown in FIG. 8 is shown in FIG. 9.

[0059] Figure 17 A partial enlarged view of the third electrode assembly shown in FIG. 9 is shown in FIG. 10.

[0060] Figure 18 Figure 17 A structural schematic view of a processing device provided by an embodiment of the present application is shown in FIG. 11.

[0061] Figure 19 A structural schematic view of a processing device provided by an embodiment of the present application is shown in FIG. 11. Figure 18

[0062] A structural schematic view of a processing device provided by an embodiment of the present application is shown in FIG. 11. Figure 20 Reference signs:

[0063] 10 - base assembly; 101 - first liquid inlet; 102 - first liquid outlet; 103 - chamber;

[0064] 20 - energy capturing device; 21 - casing; 211 - second liquid inlet; 212 - second liquid outlet; 22 - rotor; 221 - disc; 222 - ball shaft; 223 - support plate; 224 - groove; 23 - baffle; 24 - transmission assembly; 241 - transmission shaft; 242 - rotating roller;

[0065] ​​​​​

[0066] 30 - power generation device; 31 - power generation unit; 311 - electrode block; 312 - first friction ball; 313 - magnetic cylinder roller; 314 - first coil winding;

[0067] 321 - first rotating part; 322 - first diaphragm; 323 - first fixed part; 324 - first electrode assembly; 3241 - first electrode block; 3242 - second electrode block;

[0068] 331 - rotating base; 332 - magnet; 333 - fixed base; 334 - second coil winding;

[0069] 40 - sensing device; 411 - second electrode assembly; 4111 - third electrode block; 4112 - fourth electrode block; 412 - second friction ball;

[0070] 421 - roller; 422 - third electrode assembly; 4221 - fifth electrode block; 4222 - sixth electrode block;

[0071] 431 - second rotating part; 4311 - rotating shaft; 4312 - support; 432 - second diaphragm; 433 - second fixed part; 434 - fourth electrode assembly; 4341 - seventh electrode block; 4342 - eighth electrode block; 435 - charge supplementing block;

[0072] 441 - inner ring; 442 - outer ring; 443 - ball; 444 - fifth electrode assembly; 4441 - ninth electrode block; 4442 - tenth electrode block;

[0073] 50 - processing device; 51 - power management module; 52 - processing module; 53 - display module; 54 - communication module. DETAILED DESCRIPTION

[0074] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0075] The embodiment of the present application provides a self-powered flow sensor to solve the problem that the intelligent meter needs external power supply or battery power supply in the prior art, is affected by the working state of the external power supply and the battery capacity, and is difficult to ensure continuous and stable operation.

[0076] As Figures 1-20As shown, the self-powered flow sensor comprises a base assembly 10, an energy capturing device 20, a power generating device 30, a sensing device 40, and a processing device 50, wherein: the base assembly 10 is provided with a first liquid inlet 101, a first liquid outlet 102, and a chamber 103 communicating the first liquid inlet 101 and the first liquid outlet 102;

[0077] The energy capturing device 20 is arranged in the chamber 103 and comprises a casing 21 and a rotor 22 arranged in the casing 21, the casing 21 is provided with a second liquid inlet 211 and a second liquid outlet 212, the second liquid inlet 211 communicates with the first liquid inlet 101, and the second liquid outlet 212 communicates with the first liquid outlet 102; the rotor 22 comprises a disc 221 and a ball shaft 222 arranged at the center of the disc 221, the disc 221 performs a swing rotation movement around the ball shaft 222 under the drive of the liquid;

[0078] The power generating device 30 is configured to operate under the drive of the rotor 22 and output alternating current;

[0079] The sensing device 40 is configured to operate under the drive of the rotor 22 and output a pulse signal;

[0080] The processing device 50 is connected with the power generating device 30 and the sensing device 40, and is configured to rectify the alternating current output by the power generating device 30 and convert the pulse signal output by the sensing device 40 into flow information of the liquid.

[0081] Specifically, as shown in Figure 2 The base assembly 10 is provided with the first liquid inlet 101 and the first liquid outlet 102, in use, the first liquid inlet 101 and the first liquid outlet 102 of the base assembly 10 are connected with pipelines respectively, so that the liquid flowing in the pipelines can pass through the system, thereby monitoring the flow.

[0082] Referring to Figure 2 , the base assembly 10 is internally provided with the chamber 103, the chamber 103 communicates the first liquid inlet and the first liquid outlet 102, and can provide accommodation space for the energy capturing device 20 and the like, wherein, as Figure 3As shown, the energy capturing device 20 comprises a casing 21, and a rotor 22 is arranged in the casing 21. The rotor 22 is a disc-shaped rotor 22 comprising a disc 221 and a spherical shaft 222 located at the center of the disc 221. The surface of the casing 21 is provided with a second liquid inlet 211 and a second liquid outlet 212. The second liquid inlet 211 is in communication with the first liquid inlet 101, and the second liquid outlet 212 is in communication with the first liquid outlet 102. In addition to the rotor 22, the casing 21 is also provided with a baffle 23. The disc 221 is provided with an opening, and the baffle 23 passes through the opening. The baffle 23 separates the second liquid inlet 211 and the second liquid outlet 212, so as to avoid the liquid flowing out of the second liquid outlet 212 directly after entering the casing 21 from the second liquid inlet 211. The inner cavity of the casing 21 is provided with a groove (not shown), and the spherical shaft 222 is located in the groove. During the flowing of the liquid through the casing 21, the disc 221 performs a swinging rotary motion around the spherical shaft 222 under the driving of the liquid. The volume of the liquid sent from the second liquid inlet 211 to the second liquid outlet 212 is equal to the volume of the space of the metering chamber inside the casing 21 during one rotation of the disc 221.

[0083] As shown in the drawings, Figure 3 The second liquid inlet 211 is arranged on the top wall of the casing 21, and the second liquid outlet 212 is arranged on the side wall of the casing 21. In addition, the side wall of the casing 21 is also provided with a liquid guide groove 213. After the casing 21 is arranged in the base assembly 10, the liquid guide groove 213 and the inner wall of the base assembly 10 form a flow guide channel. The flow guide channel is in communication with the first liquid inlet 101 and the second liquid inlet 211. The second liquid outlet 212 is arranged opposite to the first liquid outlet 102. During use, the liquid enters the base assembly 10 from the first liquid inlet 101, then enters the casing 21 through the flow guide channel and the second liquid inlet 211. In the casing 21, the liquid drives the disc 221 to perform a swinging rotary motion. Finally, the liquid flows out through the second liquid outlet 212 and the first liquid outlet 102.

[0084] Under the driving of the liquid, the disc 221 performs a swinging rotary motion around the spherical shaft 222 and drives the power generation device 30 to operate, thereby generating alternating current. The alternating current can be rectified by the processing device 50 to supply power to the internal electrical components, thereby achieving self-driving and eliminating the need for external power supply or battery power supply. The power generation device 30 can generate electricity by using the principle of friction electrification and electrostatic induction coupling, or by using the principle of electromagnetic induction. The two power generation principles and related structures will be described below, and will not be described in detail here.

[0085] As the disc 221 swings and rotates, the sensing device 40 operates accordingly and outputs pulse signals. Within a set time T, the number of pulse signals is positively correlated with the amplitude of the disc 221's swing and rotation. After processing in the processing device 50, the pulse signals can be converted into liquid flow information to achieve flow monitoring. The flow information can be displayed on the screen or sent to the terminal device for users to view at any time.

[0086] The self-powered flow sensor drives the generator 30 and the sensing device 40 to operate by rotating the disc rotor 22, which are used to generate electricity and output pulse signals respectively. On the one hand, it achieves self-powered operation, and on the other hand, it uses pulse signals to measure the flow rate. The overall structure is relatively simple.

[0087] In some embodiments, the ball shaft 222 has a hollow structure, and the power generation device 30 and / or the sensing device 40 are disposed inside the ball shaft 222.

[0088] This is because while the disc 221 is swinging and rotating, the ball shaft 222 is also constantly rotating. By setting the ball shaft 222 as a hollow structure, it can provide space for the power generation device 30 and the sensing device 40, and can drive the power generation device 30 and the sensing device 40 to operate, thereby generating electricity or monitoring flow, improving space utilization and making the overall structure more compact.

[0089] Optionally, either the power generation device 30 or the sensing device 40 can be located within the ball shaft 222, or both can be located within the ball shaft 222.

[0090] The power generation device 30 and the sensing device 40 can also be located outside the ball shaft 222. In this case, the energy harvesting device 20 also includes a transmission assembly 24. The input end of the transmission assembly 24 is located inside the housing 21, and the output end of the transmission assembly 24 is located outside the housing 21. The transmission assembly 24 is configured to rotate under the drive of the rotor 22. The power generation device 30 is located at the output end of the transmission assembly 24 and generates electricity under the drive of the transmission assembly 24. And / or, the sensing device 40 is located at the output end of the transmission assembly 24 and generates pulse signals under the drive of the transmission assembly 24.

[0091] like Figure 4 As shown, the transmission assembly 24 includes a transmission shaft 241, a bearing (not labeled), and a rotating roller 242. The transmission shaft 241 passes through the top wall of the housing 21. The bearing is located between the transmission shaft 241 and the top wall of the housing 21. The rotating roller 242 is located at the end of the transmission shaft 241 and is located inside the housing 21. The ball shaft 222 pushes the rotating roller 242 to rotate during rotation. The rotating roller 242 drives the transmission shaft 241 to rotate. The transmission shaft 241 then drives the power generation device 30 and / or the sensing device 40 to operate.

[0092] The following will be described in detail from the structure, working principle of the power generation device 30 and the sensing device 40, and the position of the relative ball shaft 222 and the like.

[0093] For the power generation device 30, the power generation device 30 can be arranged in the ball shaft 222, as shown in the figure, a plurality of support plates 223 are arranged in the ball shaft 222, the support plates 223 are stacked and arranged in intervals along the central axis of the ball shaft 222, thereby separating a plurality of independent spaces in the ball shaft 222; the power generation device 30 comprises a plurality of power generation units 31, the power generation units 31 correspond to the support plates 223 one by one, each power generation unit 31 is located in an independent space, and continues to refer to Figure 5 , the power generation unit 31 comprises two electrode blocks 311 and a plurality of first friction small balls 312, the two electrode blocks 311 are arranged on the surface of the support plate 223, and the first friction small balls 312 can move freely on the surface of the electrode block 311; during the rotation of the rotor 22, the plurality of first friction small balls 312 reciprocate between the two electrode blocks 311, so that a potential difference is generated between the two electrode blocks 311, which drives the electrons to flow in the external circuit to form current, thereby outputting to the outside. Figure 5

[0094] Among them, the material of the electrode block 311 includes copper, aluminum, silver and the like, and the material of the first friction small ball 312 includes polytetrafluoroethylene (PTFE), fluorinated ethylene propylene copolymer (FEP) and the like. Optionally, the electrode block 311 is made of copper, the first friction small ball 312 is made of polytetrafluoroethylene, and the surface of the electrode block 311 can also be provided with a film layer made of a high polymer material with a triboelectric effect.

[0095] In the above embodiment, the power generation device 30 utilizes the principle of triboelectricity to generate electricity by reciprocating the first friction small ball 312 between the two electrode blocks 311, in addition to this, it can also utilize the principle of electromagnetic induction to generate electricity, as shown in Figure 17 , the power generation unit 31 comprises a magnetic column roller 313 and a first coil winding 314, the magnetic column roller 313 is arranged on the surface of the support plate 223, and the first coil winding 314 is arranged above the support plate 223, during the movement of the rotor 22, the magnetic column roller 313 makes a circular motion on the surface of the support plate 223 relative to the center of the support plate 223, and the first coil winding 314 cuts the magnetic induction lines to generate current.

[0096] Optionally, the surface of the support plate 223 is provided with a groove, the groove is arranged in the circumferential direction, the magnetic column roller 313 is located in the groove and rolls along the groove, in order to avoid the magnetic column roller 313 from separating from the support plate 223, one end of the magnetic column roller 313 is provided with a connecting rod, the connecting rod is hinged with the center of the support plate 223, in this way, the magnetic column roller 313 can stably make a circular motion on the surface of the support plate 223 without separating from the support plate 223. ​

[0097] The power generation device 30 can also be arranged outside the ball shaft 222 and driven by the transmission assembly 24 to generate electricity, as shown in Figure 9 、 Figure 10 、 Figure 11 The power generation device 30 includes a first rotating part 321, a first diaphragm 322, a first fixed part 323, and a first electrode assembly 324. The first rotating part 321 is connected to the output end of the transmission assembly 24 and can rotate with the transmission assembly 24. The first diaphragm 322 is arranged on the first rotating part 321 and rotates synchronously with the first rotating part 321. The first fixed part 323 is connected to the base assembly 10 and fixed relative to the base assembly 10. The first electrode assembly 324 is arranged on the first fixed part 323 and includes a first electrode block 3241 and a second electrode block 3242. The first electrode block 3241 and the second electrode block 3242 are arranged along the circumference and connected to an external circuit. The first electrode block 3241 and the second electrode block 3242 output alternating current when the first diaphragm 322 alternately contacts the first electrode block 3241 and the second electrode block 3242.

[0098] The first diaphragm 322 is made of a high polymer material with triboelectric effect, such as Kapton (polyimide), PTFE (polytetrafluoroethylene), and FEP (thin film and fluorinated ethylene propylene copolymer). The first diaphragm 322 is arranged on the first rotating part 321 and rotates with the first rotating part 321. The first electrode block 3241 and the second electrode block 3242 are arranged on the first fixed part 323 and located on the rotation path of the first diaphragm 322. The surface of the first electrode block 3241 and the second electrode block 3242 can also be provided with a film layer made of a high polymer material with triboelectric effect. The first diaphragm 322 alternately contacts the first electrode block 3241 and the second electrode block 3242 while the first electrode block 3241 and the second electrode block 3242 are fixed. When the first diaphragm 322 contacts the first electrode block 3241 and does not contact the second electrode block 3242, charge transfer occurs on the contact surface of the first diaphragm 322 and the first electrode block 3241, a potential difference is generated between the first electrode block 3241 and the second electrode block 3242, and the potential difference drives electrons to flow in the external circuit to form current. Similarly, when the first diaphragm 322 contacts the second electrode block 3242 and does not contact the first electrode block 3241, a potential difference is also generated between the first electrode block 3241 and the second electrode block 3242, thereby outputting current to the external circuit.

[0099] With the rotation of the first rotating part 321, the first diaphragm 322 will alternately contact the first electrode block 3241 and the second electrode block 3242, and the contact area will change from small to large and then from large to small. The above-mentioned two states are the states at two certain moments, and at other moments, the first diaphragm 322 can also contact a part of the first electrode block 3241 and a part of the second electrode block 3242 at the same time, but as long as there is a potential difference between the first electrode block 3241 and the second electrode block 3242, current will be output to the external circuit. During the continuous rotation of the first diaphragm 322, the first electrode block 3241 and the second electrode block 3242 will output alternating current to the outside.

[0100] The number of the first electrode block 3241 and the second electrode block 3242 is not limited, in order to improve the power generation efficiency, the number of the first electrode block 3241 and the second electrode block 3242 is multiple, and the first electrode block 3241 and the second electrode block 3242 are alternately arranged along the circumference, wherein the first electrode block 3241 can be connected as a whole, and the second electrode block 3242 can be connected as a whole.

[0101] Optionally, the number of the first diaphragm 322, the first electrode block 3241 and the second electrode block 3242 is equal, and they are uniformly distributed along the circumference, with the rotation of the first rotating part 321, multiple first diaphragms 322 can simultaneously rub against the first electrode block 3241 and / or the second electrode block 3242 to generate electricity and electrostatic induction effect, and the generated electricity is superimposed.

[0102] Further, as shown in Figure 10 , the number of the first electrode assembly 324 is three, and the three first electrode assemblies 324 are arranged in phase difference and stacked, forming a three-phase coupled electrode group, so that the purpose of tending to direct current output can be achieved.

[0103] In the case where the power generation device 30 is arranged outside the ball shaft 222, electromagnetic induction principle can also be used for power generation, as shown in Figure 14 , the power generation device 30 includes a rotating base 331, a magnet 332, a fixed base 333 and a second coil winding 334, wherein the rotating base 331 is connected with the output end of the transmission assembly 24, and the rotating base 331 can rotate with the rotation of the transmission assembly 24; the magnet 332 is arranged on the rotating base 331 and rotates synchronously with the rotating base 331; the fixed base 333 is connected with the base body assembly 10 and is fixed relative to the base body assembly 10; the second coil winding 334 is arranged on the fixed base 333, and during the rotation of the magnet 332, the second coil winding 334 cuts the magnetic induction lines to generate induced current.

[0104] The number of the magnet 332 and the second coil winding 334 is not limited, in order to improve the power generation efficiency, the magnet 332 and the second coil winding 334 are both multiple, and are uniformly distributed along the circumference, and the multiple second coil windings 334 form at least one three-phase coil winding, the three-phase coil winding includes three second coil windings 334 uniformly distributed along the circumference, that is, the three second coil windings 334 are 120° apart, and the three-phase coil winding further improves the power generation efficiency.

[0105] For the sensing device 40, the sensing device 40 can be arranged in the ball shaft 222, as shown in Figure 15 、 Figure 16 The sensing device 40 includes a second electrode assembly 411 and a second friction ball 412, the ball shaft 222 is provided with an annular groove 224, the second electrode assembly 411 is arranged on the bottom surface of the groove 224, the second electrode assembly 411 includes a third electrode block 4111 and a fourth electrode block 4112, the third electrode block 4111 and the fourth electrode block 4112 are arranged along the circumference, and the third electrode block 4111 and the fourth electrode block 4112 are respectively connected with an external circuit; the second friction ball 412 is arranged in the groove 224 and rolls on the surface of the second electrode assembly 411 along the groove 224, and the third electrode block 4111 and the fourth electrode block 4112 output pulse signals outwardly in the process of alternately contacting the third electrode block 4111 and the fourth electrode block 4112.

[0106] The material of the second friction ball 412 includes polytetrafluoroethylene (PTFE), fluorinated ethylene propylene copolymer (FEP) and the like, and the second friction ball 412 can alternately contact the third electrode block 4111 and the fourth electrode block 4112 in the rolling process, when the second friction ball 412 contacts the third electrode block 4111 without contacting the fourth electrode block 4112, the second friction ball 412 and the third electrode block 4111 generate charge transfer on the contact surface, and a potential difference is generated between the third electrode block 4111 and the fourth electrode block 4112, which drives electrons to flow in the external circuit to form current; similarly, when the second friction ball 412 contacts the fourth electrode block 4112 without contacting the third electrode block 4111, a potential difference is also generated between the third electrode block 4111 and the fourth electrode block 4112, which drives electrons to flow in the external circuit to form current.

[0107] The surface of the third electrode block 4111 and the fourth electrode block 4112 can also be provided with a film layer made of a high polymer material with a triboelectric effect.

[0108] The number of the third electrode block 4111 and the fourth electrode block 4112 is not limited, and the third electrode block 4111 and the fourth electrode block 4112 are both multiple, and are arranged alternately along the circumference, and as shown in Figure 16As shown, the third electrode blocks 4111 can be integrated to form a zigzag structure, and the fourth electrode blocks 4112 can also be integrated to form a zigzag structure, and the two zigzag structures are staggered. In this way, the third electrode blocks 4111 can share one wire output, and the fourth electrode blocks 4112 can share one wire output, so that the wiring is simpler.

[0109] The faster the rotation speed of the ball shaft 222 is, the more times the second friction ball 412 passes through the third electrode blocks 4111 and the fourth electrode blocks 4112, and the more pulse signals are generated in the set time T.

[0110] During the rolling process of the second friction ball 412, the third electrode blocks 4111 and the fourth electrode blocks 4112 generate rolling friction, and the friction is small, which reduces the wear during the contact process and prolongs the service life.

[0111] With reference to Figure 16 , the number of grooves 224 is two, the two grooves 224 are oppositely arranged, and the second friction ball 412 is arranged between the two grooves 224; the number of second electrode assemblies 411 is two, the two second electrode assemblies 411 correspond to the two grooves 224 one by one, and the arrangement order of the third electrode blocks 4111 and the fourth electrode blocks 4112 in the two second electrode assemblies 411 is opposite.

[0112] That is, in the two second electrode assemblies 411, the third electrode blocks 4111 in the upper second electrode assembly 411 correspond to the fourth electrode blocks 4112 in the lower second electrode assembly 411, and the fourth electrode blocks 4112 in the upper second electrode assembly 411 correspond to the third electrode blocks 4111 in the lower second electrode assembly 411. In this way, when the second friction ball 412 contacts the third electrode blocks 4111 in one of the second electrode assemblies 411, it also contacts the fourth electrode blocks 4112 in the other second electrode assembly 411. The two second electrode assemblies 411 output two groups of signals with the same amplitude but opposite signs, and the signals are subtracted through signal processing, so as to amplify the signal, thereby solving the problem that the sensing signal is too small to be easily interfered and detected.

[0113] As Figure 17 , Figure 18 , Figure 19As shown, the ball shaft 222 is provided with a support plate 223, the sensing device 40 comprises a roller 421 and a third electrode assembly 422, the roller 421 is configured to make a circular motion on the surface of the support plate 223 relative to the center of the support plate 223 during the movement of the rotor 22; the third electrode assembly 422 is arranged on the surface of the support plate 223 and comprises a fifth electrode block 4221 and a sixth electrode block 4222, the fifth electrode block 4221 and the sixth electrode block 4222 are arranged in a circumferential direction, and the fifth electrode block 4221 and the sixth electrode block 4222 are respectively connected with an external circuit; during the contact of the roller 421 with the fifth electrode block 4221 and the sixth electrode block 4222 alternately, the fifth electrode block 4221 and the sixth electrode block 4222 output pulse signals outward.

[0114] Optionally, the surface of the support plate 223 is provided with a groove, the groove is arranged in a circumferential direction, the roller 421 is located in the groove and rolls along the groove, in order to avoid the roller 421 from being separated from the support plate 223, one end of the roller 421 is provided with a connecting rod, the connecting rod is hinged with the center of the support plate 223, in this way, the roller 421 can stably make a circular motion on the surface of the support plate 223 without being separated from the support plate 223.

[0115] The fifth electrode block 4221 and the sixth electrode block 4222 are both multiple and arranged in a circumferential direction alternately, and, as shown in Figure 18 , Figure 19 The fifth electrode block 4221 can be integrated to form a sawtooth structure, and the sixth electrode block 4222 can also be integrated to form a sawtooth structure, and the two are arranged alternately, during the rolling in a circumferential direction, the magnetic cylinder roller 313 contacts the fifth electrode block 4221 and the sixth electrode block 4222 alternately, a potential difference is generated between the fifth electrode block 4221 and the sixth electrode block 4222, thereby driving the flow of electrons in the external circuit to form a pulse signal.

[0116] The surface of the fifth electrode block 4221 and the sixth electrode block 4222 can also be provided with a film layer made of a high polymer material with a triboelectric effect.

[0117] Further, as shown in Figure 18 The number of the third electrode assembly 422 is three, the three third electrode assemblies 422 are arranged in a phase difference in a radial direction of the support plate 223, and the resolution of the flow monitoring is improved by the arrangement of the phase difference at a certain angle.

[0118] The sensing device 40 can also be arranged outside the ball shaft 222 and driven by the transmission assembly 24 to generate a pulse signal, as shown in Figure 6 , Figure 7As shown, the sensing device 40 comprises a second rotating part 431, a second diaphragm 432, a second fixed part 433 and a fourth electrode assembly 434; the second rotating part 431 is connected with the output end of the transmission assembly 24, and the second rotating part 431 can rotate with the rotation of the transmission assembly 24; the second diaphragm 432 is arranged on the second rotating part 431 and rotates synchronously with the second rotating part 431, and the second diaphragm 432 carries electric charges; the second fixed part 433 is connected with the base assembly 10 and is fixed relative to the base assembly 10; the fourth electrode assembly 434 is arranged on the second fixed part 433 and has a gap with the second diaphragm 432; the fourth electrode assembly 434 comprises a seventh electrode block 4341 and an eighth electrode block 4342, the seventh electrode block 4341 and the eighth electrode block 4342 are arranged at intervals in the circumferential direction, and the seventh electrode block 4341 and the eighth electrode block 4342 are respectively connected with an external circuit; in the process that the second diaphragm 432 alternately passes through the seventh electrode block 4341 and the eighth electrode block 4342, the seventh electrode block 4341 and the eighth electrode block 4342 output pulse signals outward.

[0119] In the process that the second diaphragm 432 rotates with the second rotating part 431, the second diaphragm 432 does not contact the seventh electrode block 4341 and the eighth electrode block 4342, and when the second diaphragm 432 and the seventh electrode block 4341 are opposite to each other and staggered with the eighth electrode block 4342, since the second diaphragm 432 carries electric charges, the seventh electrode block 4341 will occur electrostatic induction, a potential difference is generated between the seventh electrode block 4341 and the eighth electrode block 4342, the potential difference drives electrons to flow in the external circuit to form a current; similarly, when the second diaphragm 432 and the eighth electrode block 4342 are opposite to each other and staggered with the seventh electrode block 4341, the eighth electrode block 4342 will occur electrostatic induction, a potential difference is also generated between the seventh electrode block 4341 and the eighth electrode block 4342, the potential difference drives electrons to flow in the external circuit to form a current.

[0120] With the rotation of the second rotating part 431, the second diaphragm 432 will alternately pass in front of the seventh electrode block 4341 and the eighth electrode block 4342, and the area opposite to each other changes from small to large and then from large to small, the above-mentioned two states are the states at certain two moments, and at other moments, the second diaphragm 432 can be partially opposite to the seventh electrode block 4341 and partially opposite to the eighth electrode block 4342, but as long as there is a potential difference between the seventh electrode block 4341 and the eighth electrode block 4342, a current will be generated in the external circuit. In the continuous rotation process of the second diaphragm 432, a pulse signal can be obtained in the external circuit.

[0121] There are multiple seventh electrode blocks 4341 and eighth electrode blocks 4342, arranged alternately along the circumference. Furthermore, the seventh electrode blocks 4341 can be connected to form a serrated structure, and similarly, the eighth electrode blocks 4342 can also be connected to form a serrated structure. The two types are arranged alternately, one above the other. Figure 8 This is a schematic diagram of the fourth electrode assembly 434 after it has been unfolded.

[0122] Within a set time T, the faster the rotor 22 rotates, the more times the second diaphragm 432 passes through the seventh electrode block 4341 and the eighth electrode block 4342, and the more pulse signals are generated.

[0123] During the rotation of the second diaphragm 432 with the second rotating part 431, since it does not come into contact with the seventh electrode block 4341 and the eighth electrode block 4342, wear caused during contact is avoided, thus extending its service life.

[0124] The sensing device 40 mainly utilizes the principle of electrostatic induction. As the charged second diaphragm 432 alternately passes over the seventh electrode block 4341 and the eighth electrode block 4342, electrostatic induction occurs between the seventh electrode block 4341 and / or the eighth electrode block 4342, generating a potential difference that outputs current. Specifically, the second diaphragm 432 is a diaphragm treated with high voltage polarization. After polarization, the surface of the second diaphragm 432 can be filled with a large amount of charge, or, as... Figure 7 As shown, a charge replenishing block 435 is provided on the surface of the second fixing part 433. During the rotation of the second rotating part 431, the second diaphragm 432 contacts the charge replenishing block 435 to replenish the charge. The material of the charge replenishing block 435 includes, but is not limited to, copper, aluminum, silver, and rabbit hair.

[0125] In addition, such as Figure 12 As shown, the sensing device 40 may further include an inner ring 441, an outer ring 442, a ball bearing 443, and a fifth electrode assembly 444. The inner ring 441 is connected to the output end of the transmission assembly 24 and can rotate with the rotation of the transmission assembly 24. The outer ring 442 is fixed relative to the base assembly 10 and is a ring structure made of polymer material. The ball bearing 443 is disposed between the inner ring 441 and the outer ring 442 and can roll between them. The fifth electrode assembly 444 is disposed on the outer wall surface of the outer ring 442 and includes a ninth electrode block 4441 and a tenth electrode block 4442. The ninth electrode block 4441 and the tenth electrode block 4442 are spaced apart circumferentially and are respectively connected to an external circuit. As the ball bearing 443 alternately passes through the ninth electrode block 4441 and the tenth electrode block 4442, the ninth electrode block 4441 and the tenth electrode block 4442 output pulse signals to the outside.

[0126] In use, the inner ring 441 will rotate with the rotation of the inner ring 441, and the rolling ball 443 will roll between the inner ring 441 and the outer ring 442, the rolling ball 443 will rub against the outer ring 442, and the contact surface will generate a transfer of electric charge. At time T, due to the triboelectric effect, the part of the surface of the outer ring 442 in contact with the rolling ball 443 has an electric charge. At this time, the ninth electrode block 4441 or the tenth electrode block 4442 corresponding to the part will generate electrostatic induction, and a potential difference will be generated between the ninth electrode block 4441 and the tenth electrode block 4442. The potential difference drives electrons to flow in the external circuit to form an electric current. In the continuous rolling process of the rolling ball 443, a pulse signal can be obtained in the external circuit.

[0127] The number of rolling balls 443 can be equal to the number of ninth electrode blocks 4441 and tenth electrode blocks 4442, and they are uniformly distributed along the circumference. In this way, the pulse signals generated at the same time are superimposed, making it easier to identify the pulse signals.

[0128] In the sensing device 40, the rolling ball 443 rolls in a non-contact rolling friction with the electrode block 311 to generate an electric charge. Therefore, the service life of the sensing device 40 depends on the service life of the bearing, so the service life can be efficiently improved.

[0129] The self-powered flow sensor can use any combination of the power generation device 30 and the sensing device 40 described above, and use the electric energy generated by the power generation device 30 to power the internal power-consuming components, achieving self-powering. The pulse signal generated by the sensing device 40 is converted into flow information of the liquid, achieving flow measurement.

[0130] The self-powered flow sensor further comprises a processing device 50. In some embodiments, as shown in Figure 20 The processing device 50 comprises a power management module 51, a processing module 52, a display module 53, and / or a communication module 54. The power management module 51 is connected to the power generation device 30, and is used to convert the alternating current output by the power generation device 30 into direct current and supply power to the power-consuming components; the processing module 52 is used to convert the pulse signal into flow information of the gas; the display module 53 is used to display the flow information; and the communication module 54 is used to send the flow information to a terminal device.

[0131] The power management module 51 comprises a rectifier circuit and a DC-DC conversion circuit. The types of rectifier circuits include half-wave rectifier circuits, full-wave rectifier circuits, bridge rectifier circuits, and voltage doubler rectifier circuits, etc. Taking the bridge rectifier circuit as an example, the alternating current generated by the power generation device 30 is converted into direct current by the bridge rectifier circuit, and then the direct current is processed by the DC-DC conversion circuit for current conversion, so as to be used by the power-consuming components, which can be the processing module 52, the display module 53, the communication module 54, etc.

[0132] The processing module 52 is used to convert the pulse signal output by the sensing device into liquid flow information. It includes a microcontroller, such as the 51 series microcontroller or the STM32 series microcontroller. The microcontroller obtains the liquid flow value, and the display module 53, which is directly connected to the microcontroller, receives the information and realizes real-time display of the gas flow value.

[0133] The display module 53 includes a display screen. When the display module 53 is provided inside the processing device 50, the display module 53 can be directly connected to the processing module 52 via a data cable or wirelessly. The display module 53 can display the gas flow rate value in real time. When the processing device 50 does not have a display module, a communication module 54 can be provided to connect to the processing module 52. The communication module 54 can then send the gas flow rate information to terminal devices such as mobile phones for users to view in real time. The communication module 54 is specifically a wireless communication module, including but not limited to Bluetooth, LoRa, and nRF24L01. Of course, the processing device 50 can simultaneously include both the display module 53 and the communication module 54.

[0134] Optionally, the power management module 51 also includes a battery and a charging and discharging integrated circuit. The battery stores electrical energy or supplies power to electrical components through the charging and discharging integrated circuit. That is, when the electrical energy demand of the electrical components is high, the battery can supply power to the electrical components through the charging and discharging integrated circuit to replenish the electrical energy. When there is excess power, the electrical energy will be stored in the battery through the charging and discharging integrated circuit.

[0135] The base component 10, the power generation device 30, the sensing device 40, and the processing device 50 have been described separately above. In order to better understand the self-powered flow sensor provided in the embodiments of the present invention, several specific self-powered flow sensors are listed below for illustrative purposes.

[0136] Example 1

[0137] This embodiment provides a self-powered flow sensor based on a supplementary charge type, such as... Figures 1-7 As shown, the self-powered flow sensor includes a base assembly 10, an energy harvesting device 20, a power generation device 30, a sensing device 40, and a processing device 50, wherein, as... Figure 2 As shown, the substrate assembly 10 includes a housing, which has a first liquid inlet 101 and a first liquid outlet 102. A chamber 103 is disposed inside the housing, and the energy harvesting device 20 is disposed within the chamber 103. Figure 3 , Figure 4 As shown, the energy harvesting device 20 includes a housing 21, a rotor 22 disposed within the housing 21, and a transmission assembly 24. The rotor 22 is a disc-shaped rotor 22, including a disc 221 and a ball shaft 222. The ball shaft 222 has a hollow structure, as shown in the figure. Figure 5As shown, the ball shaft 222 is provided with a plurality of support plates 223, which separate the space in the ball shaft 222 into a plurality of independent spaces, and the power generation device 30 is arranged in the ball shaft 222. The power generation device 30 includes a plurality of power generation units 31, each of which is located in an independent space. The power generation unit 31 includes two electrode blocks 311 and a plurality of first friction beads 312. The two electrode blocks 311 are arranged on the surface of the support plate 223, and the first friction beads 312 can move freely on the surface of the electrode block 311. During the rotation of the rotor 22, the plurality of first friction beads 312 reciprocate between the two electrode blocks 311, so that a potential difference is generated between the two electrode blocks 311. The potential difference drives the flow of electrons to form an electric current, thereby outputting electric energy to the outside.

[0138] The sensing device 40 is arranged outside the ball shaft 222 and is driven to rotate by the transmission assembly 24, as shown in Figure 6 、 Figure 7 As shown, the sensing device 40 includes a second rotating part 431, a second diaphragm 432, a second fixed part 433, and a fourth electrode assembly 434. The second rotating part 431 includes a rotating shaft 4311 and a plurality of supports 4312 arranged on the rotating shaft 4311 and extending radially. The rotating shaft 4311 is connected to the transmission shaft 241 of the transmission assembly 24. Specifically, the connecting end of the rotating shaft 4311 and the connecting end of the transmission shaft 241 are respectively provided with upper and lower magnets, which are fixed by magnetic attraction, so that the rotating shaft 4311 can rotate with the transmission shaft 241. The top end of the rotating shaft 4311 is assembled in the groove of the system top cover through a bearing. The end of the support 4312 away from the rotating shaft 4311 is provided with a fixed plate, and the second diaphragm 432 is arranged on the surface of the fixed plate, thereby rotating synchronously with the rotating shaft 4311. The second fixed part 433 is in the shape of a cylinder and is arranged outside the second rotating part 431. The second fixed part 433 is fixedly connected to the outer shell of the base assembly 10 and is stationary relative to the base assembly 10. The fourth electrode assembly 434 is arranged on the inner wall surface of the second fixed part 433 and has a gap with the second diaphragm 432. The fourth electrode assembly 434 includes a seventh electrode block 4341 and an eighth electrode block 4342, which are arranged at intervals in the circumferential direction. The seventh electrode block 4341 and the eighth electrode block 4342 are respectively connected to an external circuit. When the second diaphragm 432 alternately passes through the seventh electrode block 4341 and the eighth electrode block 4342, the seventh electrode block 4341 and the eighth electrode block 4342 output pulse signals to the outside.

[0139] The sensing device 40 mainly utilizes the principle of electrostatic induction. As the charged second diaphragm 432 alternately passes over the seventh electrode block 4341 and the eighth electrode block 4342, electrostatic induction occurs between them, creating a potential difference that outputs current. Furthermore, the second diaphragm 432 does not contact the seventh and eighth electrode blocks 4341 and 4342, reducing friction and extending its service life. Specifically, a charge replenishing block 435 is provided on the surface of the second fixed part 433. During the rotation of the second rotating part 431, the second diaphragm 432 contacts the charge replenishing block 435 to replenish charge and improve output performance. The material of the charge replenishing block 435 includes, but is not limited to, copper, aluminum, silver, and rabbit hair.

[0140] The structures of the substrate component 10, the energy harvesting device 20, and the processing device 50 can be referred to the foregoing content, and will not be repeated here.

[0141] Example 2

[0142] This embodiment provides a high-lifespan self-powered flow sensor based on DC output. The difference between this and the self-powered flow sensor provided in Embodiment 1 lies in the structure of the power generation device 30 and the sensing device 40. In this embodiment, as... Figure 9 As shown, both the power generation device 30 and the sensing device 40 are located outside the ball shaft 222 and operate under the drive of the transmission assembly 24. Specifically, as... Figure 10 , Figure 11 As shown, the power generation device 30 includes a first rotating part 321, a first diaphragm 322, a first fixing part 323, and a first electrode assembly 324, as follows: Figure 4 As shown, the first rotating part 321 includes a rotating cylinder, which is connected to the transmission shaft 241 of the transmission assembly 24. The connecting end of the rotating cylinder and the connecting end of the transmission shaft 241 are respectively provided with an upper magnet and a lower magnet. The two magnets attract each other to achieve fixation, so that the rotating shaft 4311 can rotate with the rotation of the transmission shaft 241. The first diaphragm 322 is disposed on the side wall surface of the rotating cylinder. There are multiple first diaphragms 322, which are spaced apart circumferentially. The first fixing part 323 is a hollow cylindrical structure and is sleeved on the outside of the first rotating part 321. There are three sets of first electrode assemblies 324, which are arranged on the inner wall surface of the first fixing part 323 with a phase difference to form a three-phase coupled electrode group, thereby achieving the purpose of approaching DC output.

[0143] A top cover is provided above the first fixing part 323, and a groove is provided inside the top cover. The sensing device 40 is disposed in the groove, such as... Figure 12As shown, the sensing device 40 includes an inner ring 441, an outer ring 442, a ball 443, and a fifth electrode assembly 444, wherein the inner ring 441 is arranged at the top end of the rotating drum and fixedly connected with the rotating drum, the inner ring 441 can rotate with the rotating drum, the outer ring 442 is fixed relative to the top cover; the ball 443 is arranged between the inner ring 441 and the outer ring 442 and can roll therebetween; the fifth electrode assembly 444 is arranged on the outer wall surface of the outer ring 442, and during the continuous rolling of the ball 443, the fifth electrode assembly 444 can output a pulse signal to an external circuit.

[0144] In the sensing device 40, the ball 443 rolls in non-contact rolling friction with the electrode block 311 to generate electric charges during rolling, and thus the service life of the sensing device 40 depends on the service life of the bearing, so that the service life can be efficiently improved.

[0145] The base assembly 10, the energy capturing device 20, and the processing device 50 can refer to the foregoing, which will not be repeated here.

[0146] Embodiment Three

[0147] The embodiment provides a self-powered flow sensor based on signal amplification, which is different from the self-powered flow sensors provided in the above two embodiments in the structures of the power generation device 30 and the sensing device 40. Specifically, as shown in Figure 13 The power generation device 30 is arranged outside the ball shaft 222 and operates under the driving of the transmission assembly 24 to generate power. The power generation device 30 includes a rotating base 331, a magnet 332, a fixed base 333, and a second coil winding 334, wherein the rotating base 331 is connected with the transmission shaft 241 of the transmission assembly 24 and rotates with the transmission shaft 241, and continues to refer to Figure 13 The rotating base 331 is in a cylindrical structure, the magnet 332 is in a sheet structure, the magnet 332 is arranged on the inner wall surface of the rotating base 331 and rotates synchronously with the rotating base 331; the fixed base 333 is also in a cylindrical structure and is fixed with the shell of the base assembly 10, the fixed base 333 is internally provided with an iron core, and the second coil winding 334 is wound on the iron core, and three second coil windings 334 uniformly distributed in the circumferential direction form a three-phase coil winding. During the rotation of the rotating base 331, the magnet 332 rotates around the second coil winding 334, and the second coil winding 334 cuts the magnetic induction lines to generate an induced current.

[0148] As shown in Figure 15 , Figure 16As shown, the sensing device 40 is arranged inside the ball shaft 222, and includes a second friction ball 412 and two second electrode assemblies 411. The ball shaft 222 is provided with two annular grooves 224, and the two grooves 224 are oppositely arranged in up and down directions. The second friction ball 412 is arranged between the two grooves 224, and contacts the groove bottoms of the two grooves 224 during rolling. The second electrode assemblies 411 are arranged on the groove bottoms of the grooves 224, and each of the second electrode assemblies 411 includes third electrode blocks 4111 and fourth electrode blocks 4112 which are alternately arranged. The arrangement sequence of the third electrode blocks 4111 and the fourth electrode blocks 4112 in the two second electrode assemblies 411 is opposite. In this way, when the second friction ball 412 contacts the third electrode blocks 4111 in one of the second electrode assemblies 411, the second friction ball 412 simultaneously contacts the fourth electrode blocks 4112 in the other second electrode assembly 411. The two second electrode assemblies 411 output two groups of signals with the same amplitude and opposite signs. The signals are subtracted through signal processing, so as to amplify the signals, thereby solving the problems that the sensing signal is too small to be detected and is easily interfered.

[0149] The base assembly 10, the energy capturing device 20 and the processing device 50 can refer to the foregoing content, and will not be repeatedly introduced herein.

[0150] Embodiment Four

[0151] The embodiment provides a self-powered flow sensor based on a three-way differential electrode type. In the self-powered flow sensor, as shown, Figure 17 As shown, the power generation device 30 and the sensing device 40 are arranged inside the ball shaft 222. Specifically, the ball shaft 222 is provided with three support plates 223 which are arranged in layers and are spaced apart along the central axis of the ball shaft 222, so as to divide the ball shaft 222 into multiple independent spaces. The power generation device 30 includes three power generation units 31, and each power generation unit 31 is located in one of the independent spaces. It is continued to refer to Figure 17 The magnetic column roller 313 is arranged on the surface of the support plate 223, and the magnetic column roller 313 performs circular motion relative to the center of the support plate 223 on the surface of the support plate 223 during the movement of the rotor 22. The first coil winding 314 is arranged above the support plate 223, and the first coil winding 314 cuts the magnetic induction lines to generate current and output electric energy outward during the rotation of the magnetic column roller 313.

[0152] The sensing device 40 is arranged on the middle layer of the support plate 223, and includes a roller 421 and a third electrode assembly 422. The third electrode assembly 422 includes fifth electrode blocks 4221 and sixth electrode blocks 4222 arranged alternately. The roller 421 is in contact with the fifth electrode blocks 4221 and the sixth electrode blocks 4222 alternately during the circumferential rolling, and a potential difference is generated between the fifth electrode blocks 4221 and the sixth electrode blocks 4222, so as to drive the electrons to flow in the external circuit to form a pulse signal.

[0153] In addition, as shown in Figure 18 the third electrode assembly 422 is three in number, and the three third electrode assemblies 422 are arranged in a phase difference layer by layer along the radial direction of the support plate 223, so as to improve the resolution of the flow monitoring through the arrangement of the phase difference.

[0154] The base body assembly 10, the energy capturing device 20 and the processing device 50 can refer to the foregoing content, and will not be introduced here again.

[0155] It can be seen from the above description that, in the self-driven monitoring system provided by the embodiment of the present application, the power generation device 30 and the sensing device 40 are driven by the disc-shaped rotor 22 respectively. On the one hand, the self-power supply is realized by using the electric energy generated by the power generation device 30, and on the other hand, the flow measurement is realized by using the pulse signal generated by the sensing device 40 to convert the flow information of the liquid. The overall structure is relatively simple.

[0156] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and the equivalent technologies thereof, the present application also intends to include these modifications and variations.

Claims

1. A self-powered flow sensor, characterized by, The base assembly, the energy capturing device, the power generating device, the sensing device, and the processing device are included. The base assembly is provided with a first liquid inlet, a first liquid outlet, and a chamber communicating the first liquid inlet and the first liquid outlet. The energy capturing device is arranged in the chamber and includes a casing and a rotor arranged in the casing. The surface of the casing is provided with a second liquid inlet and a second liquid outlet. The casing is internally provided with a baffle separating the second liquid inlet and the second liquid outlet. The rotor includes a disc and a ball shaft at the center of the disc.

2. The self-powered flow sensor of claim 1, wherein, The disc is provided with an opening through which the baffle passes.

3. The self-powered flow sensor of claim 1, wherein, The disc performs a swing rotation movement around the ball shaft under the drive of the liquid. The power generating device is configured to operate under the drive of the rotor and output alternating current.

4. The self-powered flow sensor of claim 2, wherein, The sensing device is configured to operate under the drive of the rotor and output pulse signals. The processing device is connected with the power generating device and the sensing device. The processing device is configured to rectify the alternating current output by the power generating device and convert the pulse signals generated by the sensing device into flow information of the liquid.

5. The self-powered flow sensor of claim 3, wherein, The ball shaft is a hollow structure. The power generating device and / or the sensing device are arranged in the ball shaft. The energy capturing device further includes a transmission assembly. The input end of the transmission assembly is located in the casing. The output end of the transmission assembly is located outside the casing. The transmission assembly is configured to rotate under the drive of the rotor. The power generating device is arranged at the output end of the transmission assembly and generates power under the drive of the transmission assembly. The sensing device is arranged at the output end of the transmission assembly and generates pulse signals under the drive of the transmission assembly. The ball shaft is internally provided with a plurality of support plates. The plurality of support plates are stacked and spaced along the central axis of the ball shaft. The power generating device includes a plurality of power generating units corresponding to the support plates. Each power generating unit includes two electrode blocks and a plurality of first friction balls. The two electrode blocks are arranged on the surface of the support plate. During the rotation of the rotor, the first friction balls move back and forth between the two electrode blocks. The two electrode blocks output alternating current. Alternatively, the power generating device includes a plurality of power generating units corresponding to the support plates. Each power generating unit includes a magnetic column roller and a first coil winding. The magnetic column roller is arranged on the surface of the support plate. The first coil winding is arranged above the support plate. During the rotation of the rotor, the magnetic column roller performs a circular motion on the surface of the support plate relative to the center of the support plate. The first coil winding cuts the magnetic induction lines to generate current. The power generating device includes a first rotating part, a first diaphragm, a first fixed part, and a first electrode assembly. The first rotating part is connected with the output end of the transmission assembly. The first diaphragm is arranged on the first rotating part. The first fixed part is connected with the base assembly, the first electrode assembly is arranged on the first fixed part, the first electrode assembly comprises a first electrode block and a second electrode block, the first electrode block and the second electrode block are arranged at intervals in the circumferential direction, and the first electrode block and the second electrode block are respectively connected with an external circuit; during the alternating contact of the first membrane with the first electrode block and the second electrode block, the first electrode block and the second electrode block output alternating current to the outside.

6. The self-powered flow sensor of claim 5, wherein, The number of the first electrode assemblies is three groups, and the three groups of the first electrode assemblies are arranged in a phase difference layer-by-layer mode to form a three-phase coupling electrode group.

7. The self-powered flow sensor of claim 3, wherein, The power generation device comprises a rotating base, a magnet, a fixed base and a second coil winding; The rotating base is connected with the output end of the transmission assembly, and the magnet is arranged on the rotating base; The fixed base is connected with the base assembly, and the second coil winding is arranged on the fixed base; during the rotation of the magnet, the second coil winding cuts the magnetic induction lines to generate induced current.

8. The self-powered flow sensor of claim 7, wherein, The number of the second coil windings is multiple, and the multiple second coil windings form at least one three-phase coil winding, and the three-phase coil winding comprises three second coil windings which are uniformly distributed along the circumference.

9. The self-powered flow sensor of claim 2, wherein, The sensing device comprises a second electrode assembly and a second friction ball, the ball shaft is provided with an annular groove, the second electrode assembly is arranged on the bottom surface of the groove, the second electrode assembly comprises a third electrode block and a fourth electrode block, the third electrode block and the fourth electrode block are arranged at intervals in the circumferential direction, and the third electrode block and the fourth electrode block are respectively connected with an external circuit; The second friction ball is arranged in the groove and rolls on the surface of the second electrode assembly along the groove, and during the alternating contact of the second friction ball with the third electrode block and the fourth electrode block, the third electrode block and the fourth electrode block output pulse signals to the outside.

10. The self-powered flow sensor of claim 9, wherein, The number of the grooves is two, and the grooves are oppositely arranged, and the second friction ball is arranged between the two grooves. The number of the second electrode assemblies is two, and the two second electrode assemblies correspond to the two grooves one by one, and the arrangement sequence of the third electrode block and the fourth electrode block in the two second electrode assemblies is opposite.

11. The self-powered flow sensor of claim 2, wherein, The ball shaft is provided with a support plate, the sensing device comprises a roller and a third electrode assembly, and the roller is configured to make circumferential motion on the surface of the support plate relative to the center of the support plate during the motion of the ball shaft. The third electrode assembly is arranged on the surface of the support plate and comprises a fifth electrode block and a sixth electrode block, the fifth electrode block and the sixth electrode block are arranged at intervals in the circumferential direction, and the fifth electrode block and the sixth electrode block are respectively connected with an external circuit; during the alternating contact of the roller with the fifth electrode block and the sixth electrode block, the fifth electrode block and the sixth electrode block output pulse signals to the outside.

12. The self-powered flow sensor of claim 11, wherein, The number of the third electrode assemblies is three, and the three third electrode assemblies are arranged in a phase difference layer-by-layer mode along the radial direction of the support plate.

13. The self-powered flow sensor of claim 3, wherein, The sensing device comprises a second rotating part, a second diaphragm, a second fixed part and a fourth electrode assembly; The second rotating part is connected with the output end of the transmission assembly, the second diaphragm is arranged on the second rotating part, and the second diaphragm carries an electric charge; The second fixed part is connected with the base assembly, the fourth electrode assembly is arranged on the second fixed part and has a gap with the second diaphragm, the fourth electrode assembly comprises a seventh electrode block and an eighth electrode block, the seventh electrode block and the eighth electrode block are arranged at intervals in the circumferential direction, and the seventh electrode block and the eighth electrode block are respectively connected with an external circuit; in the process that the second diaphragm alternately passes through the seventh electrode block and the eighth electrode block, the seventh electrode block and the eighth electrode block output pulse signals outward.

14. The self-powered flow sensor of claim 3, wherein, The sensing device comprises an inner ring, an outer ring, a ball, a fifth electrode assembly; The inner ring is connected with the output end of the transmission assembly; The outer ring is fixed relative to the base assembly and is a ring structure made of a high polymer material; The ball is arranged between the inner ring and the outer ring; The fifth electrode assembly is arranged on the outer wall surface of the outer ring and comprises a ninth electrode block and a tenth electrode block, the ninth electrode block and the tenth electrode block are arranged at intervals in the circumferential direction and are respectively connected with an external circuit; in the process that the ball alternately passes through the ninth electrode block and the tenth electrode block, the ninth electrode block and the tenth electrode block output pulse signals outward.

15. A self-powered flow sensor according to any one of claims 1 to 14, wherein, The processing device comprises a power management module, a processing module, a display module and / or a communication module; The power management module is connected with the power generation device and is used to convert alternating current output by the power generation device into direct current and supply power to an electric component; The processing module is used to convert the pulse signal into flow information of a liquid; The display module is used to display the flow information; The communication module is used to send the flow information to a terminal device.

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