Self-powered rainfall sensor

Abstract

The invention discloses a self-powered rainfall sensor, and relates to the field of rainfall sensors, the self-powered rainfall sensor comprises a shell, a power generation assembly and a signal processor, the power generation assembly is arranged in the shell and comprises a spiral guide rod, a friction conducting strip, a friction carbon rod and a connecting buoyancy block, the spiral guide rod is fixedly connected with the shell, and the friction conducting strip is annularly arranged; the friction conducting strip sleeves the upper end of the spiral guide rod and comprises a conducting layer and a friction layer which are sequentially arranged in the vertical direction, the friction layer comprises a plurality of positive friction parts and a plurality of negative friction parts which are sequentially and alternately arranged in the circumferential direction of the friction layer, the friction carbon rod is arranged beside the spiral guide rod, and the upper end of the friction carbon rod abuts against the friction conducting strip; the connecting buoyancy block is arranged on the periphery of the spiral guide rod in a sleeving manner, is in threaded connection with the spiral guide rod and is fixedly connected with the friction carbon rod; the signal processor is arranged in the shell and is electrically connected with the friction conducting strip and an external control terminal; self-powered monitoring of the sensor is realized, no external power supply is needed, and the monitoring effect is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of rain sensors, and particularly to a self-powered rain sensor. Background Art

[0002] A landslide refers to a geological disaster in which a mountain body slides rapidly along a slope due to natural or human factors under the action of gravity. When a landslide occurs, the slope materials lose stability, resulting in the rapid movement of a large area of soil and rock, usually causing great destructive power and seriously threatening human life and property safety as well as the ecological environment. It causes casualties and significant economic property losses. Therefore, it is very necessary to monitor mountain landslides. In order to monitor mountain landslides, rainfall is generally measured to monitor landslide changes. However, existing rain sensors need to be powered by an external power source, and are prone to power outages due to factors such as poor contact, which affects monitoring. Summary of the Invention

[0003] The main object of the present invention is to propose a self-powered rain sensor, aiming to solve the above problems.

[0004] To achieve the above object, a self-powered rain sensor proposed by the present invention includes:

[0005] A housing having a water inlet at its upper end;

[0006] A power generation assembly disposed in the housing, including a spiral guide rod, a friction conductive sheet, a friction carbon rod, and a connecting buoyancy block. The spiral guide rod extends in the vertical direction and is fixedly connected to the housing. The friction conductive sheet is annularly arranged and fixedly connected to the housing, and is sleeved on the upper end of the spiral guide rod. The friction conductive sheet includes a conductive layer and a friction layer arranged in sequence in the vertical direction. The friction layer includes a plurality of positively charged friction portions and a plurality of negatively charged friction portions alternately arranged along its circumference. The friction carbon rod is spaced beside the spiral guide rod and extends in the vertical direction. The upper end of the friction carbon rod abuts against the friction conductive sheet. The connecting buoyancy block is sleeved on the outer circumference of the spiral guide rod, is threadedly connected to the spiral guide rod, and is fixedly connected to the friction carbon rod, so as to drive the friction carbon rod to rotate around the spiral guide rod when rotating relative to the spiral guide rod and moving in the vertical direction under the buoyancy of rainwater in the housing, so that the upper end of the friction carbon rod rubs against the friction conductive sheet to generate a frictional electrical signal; and,

[0007] A signal processor disposed in the housing, for being electrically connected to the friction conductive sheet and an external control terminal, so as to calculate the rainfall according to the interval time of a plurality of the frictional electrical signals and the volume of the housing.

[0008] Optionally, the positively charged friction part is made of nylon material.

[0009] Optionally, the negatively charged friction part is made of polytetrafluoroethylene material.

[0010] Optionally, a siphon tube is provided on one side wall of the housing.

[0011] Optionally, the self-powered rain sensor further includes a waterproof housing, which is provided at the opening of the housing and has a water inlet gap between its peripheral side wall and the housing for rainwater to flow into the housing. The friction conductive sheet is provided on the lower side surface of the waterproof housing and is fixedly connected to the upper end of the spiral guide rod;

[0012] The signal processor is arranged in the waterproof housing and is electrically connected to the friction conductive sheet through a wire inserted into the side wall of the waterproof housing.

[0013] Optionally, a rainwater collector is provided at the water inlet of the housing. The rainwater collector is funnel-shaped and gradually narrows from top to bottom.

[0014] Optionally, a fixing member is provided at the bottom of the housing. The fixing member is sleeved on the lower end of the spiral guide rod and is slidably connected to the friction carbon rod.

[0015] Optionally, a sliding structure is provided between the fixing member and the friction carbon rod. The sliding structure includes a sliding rail and a sliding block that are slidably connected to each other. One of the sliding rail and the sliding block is arranged on the fixing member, and the other is arranged at the lower end of the friction carbon rod.

[0016] Optionally, a connecting ring is provided on the side wall of the connecting buoyancy block. The connecting ring is sleeved on the outer periphery of the friction carbon rod.

[0017] Optionally, the conductive layer is made of copper foil.

[0018] In the technical solution of the present invention, rainwater flows into the housing. Under the action of the buoyancy of the rainwater, the spiral guide rod can move upward and rotate around the spiral guide rod, thereby driving the friction carbon rod to rotate, so that the friction carbon rod rubs against the friction layer of the friction conductive sheet to generate electricity. Then, the conductive layer supplies power to the signal processor to realize self-powered monitoring of the sensor without external power supply, ensuring the monitoring effect. At the same time, during the rotation of the friction carbon rod, it alternately rubs against multiple positive electric friction parts and multiple negative electric friction parts, thereby alternately generating positive friction electric signals and negative friction electric signals. Also, since the volume of the housing is constant, the amount of rainwater required for the friction carbon rod to move from one friction part to another is also constant. Therefore, the rainfall can be calculated through the interval time of multiple friction electric signals, that is, the time interval between the positive friction electric signal and the negative friction electric signal, and the volume of the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0020] Figure 1 It is a cross-sectional view of an embodiment of the self-powered rainfall sensor provided by the present invention;

[0021] Figure 2 is Figure 1 the front view of the self-powered rainfall sensor in

[0022] Figure 3 is Figure 1 the partial structural schematic diagram of the self-powered rainfall sensor in

[0023] Figure 4 is Figure 3 the structural schematic diagram of the friction layer in

[0024] Explanation of the reference numerals in the drawings:

[0025] Label Name Label Name 100 Self-powered rain sensor 23 Friction carbon rod 1 Housing 24 Connected buoyancy block 2 Power generation component 3 Siphon 21 Spiral guide rod 4 Waterproof housing 22 Friction conductive sheet 5 Rainwater collector 221 Conductive layer 6 Fastening piece 222 Friction layer 7 Connecting ring 2221 Positive electric friction part 8 Circuit board 2222 Negative electric friction part

[0026] The realization of the object, functional features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0030] A landslide refers to a geological disaster in which a mountain body, under the action of gravity, causes soil, rock or other surface materials to slide rapidly along the slope due to natural or human factors. When a landslide occurs, the slope materials lose stability, resulting in the rapid movement of a large area of soil and rock, usually bringing great destructive power and seriously threatening human life and property safety as well as the ecological environment, causing casualties and significant economic property losses. Therefore, it is very necessary to monitor mountain landslides. To monitor mountain landslides, generally, the change of landslides can be monitored by measuring rainfall. However, the existing rain sensors need to be powered by an external power supply and are prone to power failure due to factors such as poor contact, which affects monitoring.

[0031] In view of this, the present invention provides a self-powered rain sensor 100. Figures 1 to 4 This is an embodiment of the self-powered rain sensor 100 provided by the present invention.

[0032] Please refer to Figures 1 to 4, the self-powered rain sensor 100 includes a housing 1, a power generation component 2, and a signal processor. An inlet is formed at the upper end of the housing 1. The power generation component 2 is disposed inside the housing 1 and includes a spiral guide rod 21, a friction conductive sheet 22, a friction carbon rod 23, and a connecting buoyancy block 24. The spiral guide rod 21 extends in the vertical direction and is fixedly connected to the housing 1. The friction conductive sheet 22 is annularly arranged and fixedly connected to the housing 1, and is sleeved on the upper end of the spiral guide rod 21. The friction conductive sheet 22 includes a conductive layer 221 and a friction layer 222 arranged in sequence in the vertical direction. The friction layer 222 includes a plurality of positive friction parts 2221 and a plurality of negative friction parts 2222 alternately arranged along its circumference. The friction carbon rod 23 is spaced beside the spiral guide rod 21 and extends in the vertical direction. The upper end of the friction carbon rod 23 abuts against the friction conductive sheet 22. The connecting buoyancy block 24 is sleeved on the outer circumference of the spiral guide rod 21, is threadedly connected to the spiral guide rod 21, and is fixedly connected to the friction carbon rod 23, so as to drive the friction carbon rod 23 to rotate around the spiral guide rod 21 when rotating relative to the spiral guide rod 21 and moving in the vertical direction under the buoyancy of rainwater in the housing 1, so that the upper end of the friction carbon rod 23 generates a friction electrical signal by friction with the friction conductive sheet 22. The signal processor is disposed inside the housing 1 and is used to be electrically connected to the friction conductive sheet 22 and an external control terminal, so as to calculate the rainfall according to the interval time of a plurality of the friction electrical signals and the volume of the housing 1.

[0033] In the technical solution of the present invention, rainwater flows into the housing 1. The spiral guide rod 21 can move upward and rotate around the spiral guide rod 21 under the action of the buoyancy of rainwater, thereby driving the friction carbon rod 23 to rotate, so that the friction carbon rod 23 generates electricity by friction with the friction layer 222 of the friction conductive sheet 22, and then supplies power to the signal processor through the conductive layer 221, realizing self-powered monitoring of the sensor without external power supply, ensuring the monitoring effect. At the same time, during the rotation of the friction carbon rod 23, it alternately frictions with a plurality of the positive friction parts 2221 and a plurality of the negative friction parts 2222, thereby alternately generating positive friction electrical signals and negative friction electrical signals. Also, since the volume of the housing 1 is constant, the amount of rainwater required for the friction carbon rod 23 to move from one friction part to another is also constant. Therefore, the rainfall can be calculated through the interval time of a plurality of the friction electrical signals, that is, the time interval between the positive friction electrical signal and the negative friction electrical signal, and the volume of the housing 1.

[0034] It should be noted that please refer to Figure 4, in an embodiment of the present invention, the friction layer 222 includes four positive - electric - property friction portions 2221 and four negative - electric - property friction portions 2222. Specifically, when the friction carbon rod 23 rotates and moves to the negative - electric - property friction portion 2222, the friction carbon rod 23 and the negative - electric - property friction portion 2222 generate a negative triboelectric signal through friction. Thus, the signal processor receives a negative - value electric signal; when the friction carbon rod 23 further rotates to the positive - electric - property friction portion 2221, the friction carbon rod 23 and the positive - electric - property friction portion 2221 generate a positive triboelectric signal through friction. Thus, the signal processor receives a positive - value electric signal. Therefore, when the friction carbon rod 23 frictions with the friction layer 222, it can generate positive - and - negative - alternating triboelectric signals. Among them, when three triboelectric signals are generated quickly, it can be determined that a measurement cycle is completed and the next measurement cycle is entered.

[0035] Furthermore, in the present invention, the positive - electric - property friction portion 2221 is prepared from materials that are easy to lose electrons and carry positive charges, such as polyimide (PI), polyurethane (PU), etc. Specifically, in an embodiment of the present invention, the positive - electric - property friction portion 2221 is formed by using nylon material, which has a low cost.

[0036] Specifically, in the present invention, the negative - electric - property friction portion 2222 is prepared from materials with negative electric properties, such as fluorinated ethylene propylene (FEP), polydimethylsiloxane (PDMS), polyester (PET), polyvinyl chloride (PVC), etc. More specifically, in an embodiment of the present invention, the negative - electric - property friction portion 2222 is formed by using polytetrafluoroethylene material (PTFE), which has a low cost.

[0037] Specifically, please refer to Figure 1 and Figure 2 , a siphon tube 3 is provided on one side wall of the housing 1. When the rainwater collected in the housing 1 reaches a certain height, the rainwater in the housing 1 will be discharged through the siphon phenomenon of the siphon tube 3, enabling the self - powered rainfall sensor 100 to repeatedly measure the rainfall multiple times, and the operation is simple and easy.

[0038] Specifically, please refer to Figure 1 and Figure 2, the self-powered rain sensor 100 further includes a waterproof housing 4. The waterproof housing 4 is provided at the opening of the housing 1 and has a water inlet gap between its peripheral side wall and the housing 1 for rainwater to flow into the housing 1. The lower side of the waterproof housing 4 is provided with the friction conductive sheet 22, which is fixedly connected to the upper end of the spiral guide rod 21. The signal processor is arranged in the waterproof housing 4 and is electrically connected to the friction conductive sheet 22 through a wire inserted into the side wall of the waterproof housing 4. In this way, by providing the waterproof housing 4, it can not only protect the internal circuit and prevent rainwater from interfering with the signal acquisition of the signal processor, but also fix the friction conductive sheet 22 and the spiral guide rod 21.

[0039] More specifically, please refer to Figure 1 and Figure 2 , the upper side of the waterproof housing 4 is arranged in an arc shape, and the convex part of the upper side is far away from the housing 1, which not only avoids water accumulation on the upper side, but also is beneficial to the housing 1 for collecting rainwater.

[0040] Furthermore, a circuit board 8 is also arranged in the waterproof housing 4, and the signal processor is electrically connected to the wire through the circuit board 8.

[0041] Specifically, please refer to Figure 1 and Figure 2 , a rainwater collector 5 is arranged at the water inlet of the housing 1. The rainwater collector 5 is arranged in a funnel shape and gradually narrows from top to bottom, which is convenient for the housing 1 to collect rainwater.

[0042] Specifically, please refer to Figure 1 , a fixing member 6 is arranged at the bottom of the housing 1. The fixing member 6 is sleeved on the lower end of the spiral guide rod 21 and is slidably connected to the friction carbon rod 23. In this way, the spiral guide rod 21 is fixed by the fixing member 6.

[0043] Furthermore, a sliding structure is arranged between the fixing member 6 and the friction carbon rod 23. The sliding structure includes a sliding rail and a sliding block that are slidably connected to each other. One of the sliding rail and the sliding block is arranged on the fixing member 6, and the other is arranged at the lower end of the friction carbon rod 23. In this way, the rotation direction of the friction carbon rod 23 can be limited to ensure the accuracy of the rainfall calculation result.

[0044] It should be noted that in the present invention, the sliding rail can be arranged on the fixing member 6, correspondingly, the sliding block is arranged at the lower end of the friction carbon rod 23; of course, the sliding rail can also be arranged at the lower end of the friction carbon rod 23, correspondingly, the sliding block is arranged on the fixing member 6.

[0045] More specifically, in an embodiment of the present invention, the fixing member 6 is arranged in a circular shape.

[0046] Specifically, please refer to Figure 1 A connecting ring 7 is provided on the side wall of the connecting buoyancy block 24, and the connecting ring 7 is sleeved on the outer periphery of the friction carbon rod 23.

[0047] Specifically, in the present invention, the conductive layer 221 is prepared from a conductive material, which may be copper, gold, etc. More specifically, in an embodiment of the present invention, the conductive layer 221 is prepared from copper foil, which has good electrical conductivity and low cost.

[0048] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A self-powered rainfall sensor, characterized in that: The self-powered rain sensor comprises: The shell body has a water inlet at its upper end; A power generation component is arranged in the shell, including a spiral guide rod, a friction conductive sheet, a friction carbon rod, and a connecting buoyancy block. The spiral guide rod is extended in the up-down direction and fixedly connected to the shell. The friction conductive sheet is arranged in an annular shape, fixedly connected to the shell, and sleeved on the upper end of the spiral guide rod. The friction conductive sheet includes a conductive layer and a friction layer arranged in sequence in the up-down direction. The friction layer includes a plurality of positive friction parts and a plurality of negative friction parts arranged alternately in sequence along its circumference. The friction carbon rod is arranged at intervals on the side of the spiral guide rod and extends in the up-down direction. The upper end of the friction carbon rod abuts against the friction conductive sheet. The connecting buoyancy block is sleeved on the outer periphery of the spiral guide rod, and is threadedly connected to the spiral guide rod and fixedly connected to the friction carbon rod, so that when the friction carbon rod rotates relative to the spiral guide rod and moves in the up-down direction under the buoyancy of rainwater in the shell, it drives the friction carbon rod to rotate around the spiral guide rod, so that the upper end of the friction carbon rod rubs with the friction conductive sheet to generate a friction electric signal; and, A signal processor is disposed in the housing and is electrically connected to the friction conductive sheet and an external control terminal to calculate rainfall according to the interval time of a plurality of the friction electric signals and the volume of the housing.

2. The self-powered rain sensor according to claim 1, characterized in that: The positively charged friction part is made of nylon material.

3. The self-powered rain sensor according to claim 1, characterized in that: The negatively charged friction part is made of polytetrafluoroethylene material.

4. The self-powered rain sensor according to claim 1, characterized in that: A siphon is provided on one side wall of the shell.

5. The self-powered rain sensor according to claim 1, characterized in that: The self-powered rain sensor further comprises a waterproof shell, which is arranged at the opening of the shell and has a water inlet gap between the waterproof shell and the peripheral side wall of the shell so that rainwater can flow into the shell. The friction conductive sheet is arranged on the lower side of the waterproof shell and is fixedly connected to the upper end of the spiral guide rod. The signal processor is arranged in the waterproof shell and is electrically connected to the friction conductive sheet through an electric wire inserted into the side wall of the waterproof shell.

6. The self-powered rain sensor according to claim 1, characterized in that: A rainwater collector is arranged at the water inlet of the shell. The rainwater collector is arranged in a funnel shape and is gradually reduced from top to bottom.

7. The self-powered rain sensor according to claim 1, characterized in that: A fixing piece is provided at the bottom of the shell, and the fixing piece is sleeved on the lower end of the spiral guide rod and is slidably connected with the friction carbon rod.

8. The self-powered rain sensor according to claim 7, characterized in that: A sliding structure is provided between the fixing member and the friction carbon rod, and the sliding structure comprises a sliding rail and a sliding block which are adapted to be slidably connected to each other, one of the sliding rail and the sliding block is provided at the fixing member, and the other is provided at the lower end of the friction carbon rod.

9. The self-powered rain sensor according to claim 1, characterized in that: A connecting ring is provided on the side wall of the connecting buoyancy block, and the connecting ring is sleeved on the outer periphery of the friction carbon rod.

10. The self-powered rain sensor of claim 1, wherein: The conductive layer is made of copper foil.

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