Water level sensor

Abstract

The utility model provides a water level sensor which comprises a water level sensor body and a winding assembly used for installing the water level sensor body, and the water level sensor body comprises a piezoresistive sensor, a waterproof wire and a junction box. The winding assembly comprises a mounting plate, a take-up reel rotationally arranged on the mounting plate, an elastic limiting piece arranged on the mounting plate and a supporting plate mounted on the mounting plate through a vertical plate, and the supporting plate, the vertical plate and the mounting plate form a containing cavity so as to contain the take-up reel; the supporting plate is used for supporting the junction box, the take-up reel is used for winding the waterproof wire so as to adjust the size of the waterproof wire in the measured liquid, and the elastic limiting piece is used for limiting rotation of the take-up reel so as to limit the size of the waterproof wire in the measured liquid and improve the measurement precision.

Description

Technical Field

[0001] The invention belongs to the technical field of water level monitoring, and in particular relates to a water level sensor. Background Art

[0002] With the construction of subway foundation pits, water conservancy dams, groundwater level monitoring and other scenarios, the demand for water level monitoring products is also increasing. A water level sensor refers to an instrument that can convert the water level parameters of the measured point into corresponding electrical signals in real time. Its working principle is: the water level sensor in the container transmits the sensed water level signal to the controller, and the computer in the controller compares the measured water level signal with the set signal to obtain the deviation, and then sends an open and close command to the water supply electric valve according to the nature of the deviation to ensure that the container reaches the set water level. After the water inlet program is completed, the computer in the temperature control part sends an open command to the electric valve that supplies the heat medium, so the system starts to heat the water in the container. When the set temperature is reached. The controller issues a valve closing command, cuts off the heat source, and the system enters the insulation state. During the programming process, ensure that the electric regulating valve that controls the heat source does not open the valve when the system does not reach the safe water level, thereby avoiding heat loss and accidents.

[0003] Existing water level sensors generally include a sensor and a junction box connected to the sensor through a wire. When measuring liquid, the sensor is placed at the bottom of the liquid to be measured, and the junction box is placed on the shore. In order to be suitable for liquids of various depths, the length of the wire is set to be longer for the water level sensor. However, when measuring liquids of shallow depth, a large part of the wire is redundant and can only be placed in the liquid. Because most of it is placed in the liquid, the wire is easily driven by the flowing liquid, thereby driving the sensor, affecting the measurement accuracy. In addition, the wire placed in the liquid is easily entangled, affecting the next use. Summary of the invention

[0004] Based on this, an object of the present invention is to provide a water level sensor for solving the technical problems in the prior art.

[0005] The invention provides the following technical solutions: a water level sensor, comprising: a water level sensor body and a winding assembly for installing the water level sensor body, the water level sensor body comprising a piezoresistive sensor, a waterproof wire, and a junction box, the winding assembly comprising a mounting plate, a take-up drum rotatably arranged on the mounting plate, an elastic limiter arranged on the mounting plate, and a support plate mounted on the mounting plate through a vertical plate, the support plate, the vertical plate and the mounting plate form an accommodating cavity to accommodate the take-up drum; the support plate is used to support the junction box, the take-up drum is used to wind up the waterproof wire to adjust the size of the waterproof wire in the measured liquid, and the elastic limiter is used to limit the rotation of the take-up drum to limit the size of the waterproof wire in the measured liquid.

[0006] Compared with the prior art, the beneficial effects of the present invention are as follows: the mounting plate is installed on the shore, and then the junction box is placed on the support plate, and then the piezoresistive sensor is thrown into the liquid to be measured, and then the elastic limiter is pulled so that the elastic limiter loses the effect of limiting the take-up reel, and then the take-up reel is rotated according to the depth of the water to reel the wire so that the piezoresistive sensor reaches the bottom of the liquid and the wire is perpendicular to the liquid, and then the elastic limiter is released. At this time, the elastic limiter squeezes the take-up reel to prevent the take-up reel from rotating. It can be seen that after the sensor is at the bottom of the liquid, the excess part of the wire can be wound up by rotating the take-up reel to make the wire in the liquid vertical to prevent the excess part of the wire from being placed in the liquid, which can reduce the influence of liquid flow on the wire, thereby improving the measurement accuracy, and on the other hand, it also prevents the wire from being entangled, and there is no need to experience it next time.

[0007] Furthermore, the junction box includes a controller, and a temperature sensor, a wireless communication module, a data storage device, and a liquid crystal display screen electrically connected to the controller respectively. The temperature sensor is used to collect the temperature signal of the water level sensor body and transmit the temperature signal to the controller. The controller transmits the temperature signal to the liquid crystal display screen and the wireless communication module. The wireless communication module is used to communicate data with the data platform.

[0008] Furthermore, the controller is electrically connected to an RTC clock, the RTC clock is used to interrupt and wake up the controller, the INT pin of the RTC clock is connected to the interrupt trigger pin of the controller, and the RTC clock communicates with the controller via IIC.

[0009] Furthermore, the controller is electrically connected to a positioning module, and the positioning module is used to collect a position signal of the water level sensor body and transmit the position signal to the controller, and the controller transmits the position signal to the wireless communication module.

[0010] Furthermore, the controller is electrically connected to a lithium-ion battery and an electronic switch, and the electronic switch turns on or off the lithium-ion battery to power the RTC clock, the controller, the temperature sensor, the wireless communication module, the data storage device, and the positioning module. When the power level of the lithium-ion battery is lower than a threshold, the electronic switch turns off the lithium-ion battery to power the temperature sensor, the wireless communication module, the data storage device, and the positioning module.

[0011] Furthermore, the elastic limiting member includes a mounting rod and a limiting rod connected by an elastic member, one end of the limiting rod is rotatably connected to the mounting plate, and the restoring elastic force of the elastic member is used to make the other end of the limiting rod squeeze the side wall of the take-up drum.

[0012] Furthermore, the other end of the limiting rod and the side of the take-up drum are respectively arranged at intervals with a plurality of protrusions.

[0013] Furthermore, a support block is connected to the bottom of the junction box, and the support block is connected to the waterproof wire. A through groove is opened on the support plate, and one end of the through groove passes through one side of the support plate so that the waterproof wire can enter the middle part of the support plate, wherein the size of the support block is larger than the size of the through groove so that the support block is supported on the support plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 A schematic diagram of the structure of a water level sensor provided by an embodiment of the present invention;

[0016] Figure 2 A schematic diagram of the structure of a water level sensor body provided by an embodiment of the present invention;

[0017] Figure 3 A schematic diagram of a module connection structure provided in an embodiment of the present invention;

[0018] Figure 4 The embodiment of the present invention provides Figure 1 Sectional view at AA in the middle;

[0019] Figure 5 The embodiment of the present invention provides Figure 1 Cross-sectional view at BB in the middle.

[0020] Explanation of the accompanying drawings: 10. Water level sensor body; 11. Piezoresistive sensor; 12. Waterproof wire; 13. Junction box; 20. Winding assembly; 21. Mounting plate; 22. Take-up reel; 23. Elastic limiter; 231. Mounting rod; 232. Elastic member; 233. Limiter rod; 24. Vertical plate; 25. Support plate; 251. Support block; 252. Through slot; 30. Controller; 31. Temperature sensor; 32. Wireless communication module; 33. Data storage device; 34. LCD display; 35. RTC clock; 36. Positioning module; 37. Lithium-ion battery; 38. Electronic switch. DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0022] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0025] like Figure 1 to Figure 2As shown, in one embodiment of the present invention, a water level sensor is provided, comprising: a water level sensor body 10 and a winding assembly 20 for installing the water level sensor body 10, the water level sensor body 10 comprising a piezoresistive sensor 11, a waterproof wire 12, and a junction box 13, the winding assembly 20 comprising a mounting plate 21, a take-up drum 22 rotatably disposed on the mounting plate 21, an elastic limiting member 23 disposed on the mounting plate 21, and a support plate 25 mounted on the mounting plate 21 through a vertical plate 24, the support plate 25, the vertical plate 24 and the mounting plate 21 forming an accommodating cavity to accommodate the take-up drum 22; the support plate 25 is used to support the junction box 13, the take-up drum 22 is used to reel the waterproof wire 12 to adjust the size of the waterproof wire 12 in the measured liquid, and the elastic limiting member 23 is used to limit the rotation of the take-up drum 22 to limit the size of the waterproof wire 12 in the measured liquid.

[0026] During the specific implementation, the mounting plate 21 is installed on the shore, and then the junction box 13 is placed on the support plate 25, and then the piezoresistive sensor 11 is thrown into the liquid to be measured, and then the elastic limiter 23 is pulled so that the elastic limiter 23 loses the function of limiting the take-up drum 22, and then the take-up drum 22 is rotated according to the depth of the water to reel in the wire so that the piezoresistive sensor 11 reaches the bottom of the liquid and the wire is perpendicular to the liquid, and then the elastic limiter 23 is released. At this time, the elastic limiter 23 squeezes the take-up drum 22 to prevent the take-up drum 22 from rotating. It can be seen that after the sensor is at the bottom of the liquid, the excess part of the wire can be wound up by rotating the take-up drum 22 to make the wire in the liquid vertical to prevent the excess part of the wire from being placed in the liquid, which can reduce the influence of liquid flow on the wire, thereby improving the measurement accuracy, and on the other hand, it also prevents the wire from being entangled, and there is no need to experience it next time.

[0027] It is understandable that in order to make the piezoresistive sensor 11 at the bottom of the liquid, the take-up reel 22 can also release the wire when the liquid is very deep, but it is necessary to ensure that the wire in the liquid is in a vertical state as much as possible. The formed accommodating cavity can effectively protect the take-up reel 22 and the waterproof wire 12 thereon.

[0028] like Figure 3 As shown, the junction box 13 includes a controller 30, and a temperature sensor 31, a wireless communication module 32, a data storage device 33, and a liquid crystal display screen 34 electrically connected to the controller 30 respectively. The temperature sensor 31 is used to collect the temperature signal of the water level sensor body 10 and transmit the temperature signal to the controller 30. The controller 30 transmits the temperature signal to the liquid crystal display screen 34 and the wireless communication module 32. The wireless communication module 32 is used to communicate data with the data platform.

[0029] The controller 30 is electrically connected to an RTC clock 35, and the RTC clock 35 is used to interrupt and wake up the controller 30. The INT pin of the RTC clock 35 is connected to the interrupt trigger pin of the controller 30, and the RTC clock 35 communicates with the controller 30 through IIC.

[0030] The controller 30 is electrically connected to a positioning module 36 , and the positioning module 36 is used to collect a position signal of the water level sensor body 10 and transmit the position signal to the controller 30 , and the controller 30 transmits the position signal to the wireless communication module 32 .

[0031] The controller 30 is electrically connected to a lithium ion battery 37 and an electronic switch 38. The electronic switch 38 turns on or off the lithium ion battery 37 to power the RTC clock 35, the controller 30, the temperature sensor 31, the wireless communication module 32, the data storage 33, and the positioning module 36. When the power of the lithium ion battery 37 is lower than a threshold, the electronic switch 38 turns off the lithium ion battery 37 to power the temperature sensor 31, the wireless communication module 32, the data storage 33, and the positioning module 36. The model of the temperature sensor 31 is DS18B20, the model of the wireless communication module 32 is NE-IOT, the model of the data storage 33 is FLASH, and the controller 30 is a MUC controller 30.

[0032] like Figure 4 As shown, specifically, the elastic limiting member 23 includes a mounting rod 231 and a limiting rod 233 connected by an elastic member 232, one end of the limiting rod 233 is rotatably connected to the mounting plate 21, and the restoring elastic force of the elastic member 232 is used to make the other end of the limiting rod 233 squeeze the side wall of the take-up drum 22. In a specific implementation, the elastic member 232 is a spring, and when the take-up drum 22 is limited, the spring is in a stretched state, and its state is a rebound force. When the other end of the limiting rod 233 needs to leave the take-up drum 22, the limiting rod 233 is rotated, and the other end of the limiting rod 233 leaves the take-up drum 22, and then the take-up drum 22 is rotated. When it is rotated to a suitable position, the operator releases the limiting rod 233, and the spring rebound force will cause the limiting rod 233 to rotate back, so that the other end of the limiting rod 233 is pressed on the take-up drum 22, so as to limit the take-up drum 22 and prevent it from rotating.

[0033] More specifically, in order to improve the limiting effect on the take-up drum 22, the other end of the limiting rod 233 and the side of the take-up drum 22 are respectively provided with a plurality of protrusions at intervals, and the friction between the two can be improved by providing protrusions on both ends.

[0034] like Figure 5 As shown, specifically, a support block 251 is connected to the bottom of the junction box 13, and the support block 251 is connected to the waterproof wire 12. A through slot 252 is provided on the support plate 25, and one end of the through slot 252 passes through one side of the support plate 25, so that the waterproof wire 12 can enter the middle of the support plate 25, wherein the size of the support block 251 is larger than the size of the through slot 252, so that the support block 251 is supported on the support plate 25. When the junction box 13 needs to be placed on the support plate 25, the waterproof wire 12 connected to the junction box 13 is passed through the through slot 252 into the middle of the support plate 25, and then the junction box 13 is put down. At this time, the support block 251 is supported on the support plate 25, so that the junction box 13 is supported on the support plate 25.

[0035] In summary, the water level sensor in the above embodiment of the present invention installs the mounting plate 21 on the shore, and then places the junction box 13 on the support plate 25, and then throws the piezoresistive sensor 11 into the liquid to be measured, and then pulls the elastic limiter 23 so that the elastic limiter 23 loses the function of limiting the take-up drum 22, and then rotates the take-up drum 22 according to the depth of the water to reel in the wire, so that the piezoresistive sensor 11 reaches the bottom of the liquid and makes the wire perpendicular to the liquid, and then releases the elastic limiter 23. At this time, the elastic limiter 23 squeezes the take-up drum 22 to prevent the take-up drum 22 from rotating. It can be seen that after the sensor is at the bottom of the liquid, the excess part of the wire can be wound up by rotating the take-up drum 22 to make the wire in the liquid vertical to prevent the excess part of the wire from being placed in the liquid, which can reduce the influence of liquid flow on the wire, thereby improving the measurement accuracy, and on the other hand, it also prevents the wire from being entangled, and there is no need to experience it next time.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water level sensor, characterized in that: The invention comprises: a water level sensor body and a winding assembly for installing the water level sensor body, wherein the water level sensor body comprises a piezoresistive sensor, a waterproof wire, and a junction box, wherein the winding assembly comprises a mounting plate, a take-up reel rotatably arranged on the mounting plate, an elastic stopper arranged on the mounting plate, and a support plate mounted on the mounting plate through a vertical plate, wherein the support plate, the vertical plate, and the mounting plate form a receiving cavity to accommodate the take-up reel; The support plate is used to support the junction box, the take-up drum is used to reel the waterproof wire to adjust the size of the waterproof wire in the measured liquid, and the elastic limiter is used to limit the rotation of the take-up drum to limit the size of the waterproof wire in the measured liquid.

2. The water level sensor according to claim 1, characterized in that: The junction box includes a controller, and a temperature sensor, a wireless communication module, a data storage device, and a liquid crystal display screen electrically connected to the controller respectively. The temperature sensor is used to collect the temperature signal of the water level sensor body and transmit the temperature signal to the controller. The controller transmits the temperature signal to the liquid crystal display screen and the wireless communication module. The wireless communication module is used to communicate data with the data platform.

3. The water level sensor according to claim 2, characterized in that: The controller is electrically connected to an RTC clock, the RTC clock is used to interrupt and wake up the controller, an INT pin of the RTC clock is connected to an interrupt trigger pin of the controller, and the RTC clock communicates with the controller via IIC.

4. The water level sensor according to claim 3, characterized in that: The controller is electrically connected to a positioning module, and the positioning module is used to collect a position signal of the water level sensor body and transmit the position signal to the controller, and the controller transmits the position signal to the wireless communication module.

5. The water level sensor according to claim 4, characterized in that: The controller is electrically connected to a lithium-ion battery and an electronic switch. The electronic switch turns on or off the lithium-ion battery to power the RTC clock, the controller, the temperature sensor, the wireless communication module, the data storage device, and the positioning module. When the power level of the lithium-ion battery is lower than a threshold, the electronic switch turns off the lithium-ion battery to power the temperature sensor, the wireless communication module, the data storage device, and the positioning module.

6. The water level sensor according to claim 1, characterized in that: The elastic limiting member includes a mounting rod and a limiting rod connected by an elastic member, one end of the limiting rod is rotatably connected to the mounting plate, and the restoring elastic force of the elastic member is used to make the other end of the limiting rod squeeze the side wall of the take-up drum.

7. The water level sensor according to claim 6, characterized in that: The other end of the limiting rod and the side of the take-up drum are respectively arranged at intervals on a plurality of protrusions.

8. The water level sensor according to claim 1, characterized in that: A support block is connected to the bottom of the junction box, and the support block is connected to the waterproof wire. A through slot is provided on the support plate, and one end of the through slot passes through one side of the support plate so that the waterproof wire can enter the middle part of the support plate, wherein the size of the support block is larger than the size of the through slot so that the support block is supported on the support plate.

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