Adaptive water depth detection device and detection system

Abstract

The present invention relates to an adaptive water depth detection device and a detection system, wherein the adaptive water depth detection device includes a waterproof housing; a water depth detection ruler, which is arranged in the waterproof housing and includes a strip circuit board and a plurality of electrodes arranged at intervals along the long side direction of the strip circuit board; a water depth calculation unit, which is connected to each electrode through the strip circuit board and monitors the capacitance change value of each electrode relative to its initial capacitance value; when the capacitance change values ​​of at least two non-adjacent electrode pieces are both greater than the immersion threshold, the height value of the lowest electrode position is used as the actual water depth height, and the initial capacitance values ​​of the electrode pieces corresponding to the remaining electrode pieces with higher capacitance change values ​​greater than the preset immersion threshold are adjusted so that the capacitance change value between the current capacitance value and the adjusted initial capacitance value is less than the preset immersion threshold, and the initial capacitance value of the electrode pieces is continuously and dynamically adjusted during the water depth measurement process, thereby improving the measurement accuracy.

Description

Technical Field

[0001] The present invention relates to the field of urban waterlogging water level detection, and in particular to the field of an adaptive water depth detection device and a detection system. Background Art

[0002] The road water level monitoring technology in the current waterlogging monitoring system in smart city construction mainly uses electromagnetic wave ranging, physical buoy detection, capacitive water level detection and other technologies.

[0003] In the field of water level detection, electromagnetic wave ranging is mainly used in scenarios with a wide detection range such as rivers. The installation conditions and costs are relatively high, and it is easily subject to electronic interference when used in cities. Therefore, it cannot be used to build urban flood monitoring systems in smart cities.

[0004] As for physical buoy detection, a physical buoy is placed on the water surface and the water depth is detected by detecting the height of the physical buoy. However, it not only has problems with complex device structure and large number of components, but also the probability of buoy failure increases with the increase of usage time, and the reliability will continue to decrease. Therefore, it is also not suitable for the construction of urban flood monitoring system in smart cities.

[0005] The basic principle of capacitive water level detection is that the dielectric constant of capacitors in different media is different, which causes the capacitance value to change. Figure 1 As shown, an existing capacitive water level detection ruler includes a waterproof housing 1, a water depth detection ruler 2, and a water depth calculation unit. There are multiple pole pieces 21 on the water depth detection ruler, each of which forms a capacitor with the ground. When water enters the device from the lower end of the waterproof housing 1, there are two media in the capacitor, namely air and water, with the air located at the top and the water located at the bottom. According to the properties of the capacitor itself, different dielectric constants will be generated when the medium is different. Therefore, as the position of water in the device changes, the capacitance of the pole piece-to-ground capacitance will change. In this way, by detecting the corresponding changes in the real-time capacitance of each pole piece and combining the height information or position information of each pole piece, the water ingress depth of the device can be determined. The capacitive water level detection device has the advantages of simple structure, high cost performance, and strong anti-electromagnetic interference ability. It can be widely used in water immersion detection in indoor environments, such as: computer room water immersion, cabinet water seepage detection and other environments.

[0006] However, some existing capacitive water level detection devices have problems such as low water level detection accuracy and inaccurate repeated measurements. Summary of the Invention

[0007] Based on this, an object of the present invention is to provide an adaptive water depth detection device and detection system.

[0008] In one aspect, the present invention provides an adaptive water depth detection device, comprising: a water-proof housing;

[0009] A water depth measuring ruler is provided in the waterproof housing and includes a strip circuit board and a plurality of electrodes spaced apart along the long side of the strip circuit board, each electrode corresponding to a height value;

[0010] A water depth calculation unit is connected to each electrode through the strip circuit board, and monitors the capacitance change value of each electrode relative to its initial capacitance value, and uses the height value of the electrode position corresponding to the capacitance change value being greater than a preset immersion threshold as the measured water depth height; when the capacitance change values ​​of at least two non-adjacent electrode pieces are both greater than the preset immersion threshold, the height value of the lowest electrode position is used as the measured water depth height, and the initial capacitance values ​​of the electrode pieces with higher height values ​​and capacitance change values ​​greater than the preset immersion threshold are adjusted so that the capacitance change value between their current capacitance value and the adjusted initial capacitance value is less than the preset immersion threshold.

[0011] Compared with the prior art, the water depth calculation unit of the adaptive water depth detection device of the present invention introduces an adaptive dynamic correction method to continuously detect changes in electrode capacitance, and dynamically adjusts the starting capacitance of electrodes suspected of having impurities or residual water, thereby ensuring the accuracy of repeated water level detection and improving the water depth detection precision, accuracy and anti-interference ability of the water depth detection device.

[0012] Furthermore, the electrode pieces are evenly spaced apart on the front and back sides of the strip circuit board, and the positions of the electrode pieces on the front side of the strip circuit board and the electrode pieces on the back side of the strip circuit board are staggered and do not overlap.

[0013] The strip circuit board and the multiple electrodes arranged on the circuit board are combined and designed so that the multiple electrodes are evenly spaced on the front and back sides of the circuit board, and the positions of the electrodes located on the front side of the strip circuit board and the electrodes located on the back side of the strip circuit board are staggered and do not overlap. Water level detection can be performed by relying on the capacitance changes of the electrodes on the front and back sides, so that the measurement error is controlled within a smaller range, thereby improving the measurement accuracy.

[0014] Furthermore, the adaptive water depth detection device also includes: a plurality of water baffles; the water baffles are spaced apart and tightly fitted on the water depth detection ruler, the water depth detection ruler is mounted in the waterproof housing through the water baffles, and there is a drainage gap between the water baffles and the inner wall of the waterproof housing.

[0015] The adaptive water depth detection device of the present invention is also equipped with a water baffle. The water baffle gets rid of the traditional drainage hole design. Based on the flow velocity principle, the water flow velocity on the surface of the strip circuit board will be lower than the water flow velocity at the edge of the water baffle. Small particles of impurities in the water will flow out along the fast-flowing path, reducing the chance of impurities adhering to the surface of the strip circuit board and improving the accuracy of water level measurement after water recedes.

[0016] Furthermore, the side edge of the water baffle is an arc convex surface.

[0017] Furthermore, the bottom of the waterproof housing is a water inlet, and a filter is provided at the water inlet.

[0018] Furthermore, the upper portion of the waterproof housing forms a sealed space with the inner wall of the housing through a water-blocking plate, and the water depth calculation unit is arranged in the sealed space.

[0019] Furthermore, the adaptive water depth detection device further includes a display unit, which is disposed on the waterproof housing and connected to the water depth calculation unit.

[0020] Furthermore, a waterproof coating is coated on the pole piece.

[0021] On the other hand, the present invention also provides an adaptive water depth detection system, which includes an adaptive water depth detection device as described in any of the above items, and an Internet of Things platform, wherein each of the adaptive water depth detection devices is also provided with a communication unit, and each communication unit is connected to the Internet of Things platform.

[0022] By connecting multiple adaptive water depth detection devices to the Internet of Things platform for communication, an urban water depth detection system can be built. By obtaining real-time information from the adaptive water depth detection devices on each road (location), information can be provided for traffic scheduling and driving navigation, thereby realizing the sharing of urban waterlogging system data.

[0023] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of an existing capacitive vehicle body wading depth detection device;

[0025] Figure 2 is a structural block diagram of an adaptive water depth detection device in one embodiment of the present invention;

[0026] Figure 3 A schematic diagram of an adaptive water depth detection device being repeatedly immersed during a water level detection process provided by the present invention;

[0027] Figure 4A partial structural perspective view of an exemplary water depth gauge provided by the present invention;

[0028] Figure 5 A structural block diagram of an adaptive water depth detection device in another embodiment of the present invention;

[0029] Figure 6 This is a schematic structural diagram of the water retaining plate provided by the present invention.

[0030] Reference numerals: 10: waterproof housing; 101: water inlet; 20: water depth gauge; 201: strip circuit board; 202: pole piece; 30: water baffle; 301: connecting column. DETAILED DESCRIPTION

[0031] Capacitive water level detection mainly determines the water level by comparing the difference between the current capacitance value between the electrodes and the initial capacitance value when no water enters. After analysis, it was found that the existing water depth detection equipment or devices may sometimes make incorrect judgments on water level detection. When the water depth detection device is immersed in water for a long time, due to the rise and fall of the water level, some electrodes will be covered with impurities or have water stains and other contamination after the water recedes. This causes the current capacitance after contamination to change compared to the initial capacitance of its clean surface. At this time, if the initial capacitance value of the clean surface is still used as the standard for judging the capacitance change, misjudgment will occur, thereby affecting the precision and accuracy of water level detection.

[0032] Based on this, the present invention proposes an adaptive water depth detection device that improves the water level assessment method used by the water depth calculation unit. During the water level detection process, the device continuously identifies contaminated electrodes and adjusts the initial capacitance values ​​of these contaminated electrodes so that the capacitance change between their current capacitance and the adjusted initial capacitance value is less than a preset immersion threshold, thereby improving the accuracy of water level detection. This is specifically described in Example 1 below.

[0033] Example 1:

[0034] See also Figure 2 , Figure 2 The structure diagram of the adaptive water depth detection device provided by the present invention is as follows: The adaptive water depth detection device of the present invention comprises a waterproof housing 10, a water depth detection ruler 20, and a water depth calculation unit (not shown).

[0035] Specifically, the waterproof housing 10 is a sealed enclosure that can be cylindrical or cubical, depending on actual needs. A square housing is used as an example in this disclosure. The bottom of the housing serves as a water inlet for water intake and discharge. A filter is located at the inlet of the waterproof housing 10 to prevent large impurities from entering and damaging the device. A water-blocking plate forms a sealed space between the upper portion of the waterproof housing 10 and the inner wall of the housing. The water depth calculation unit is located within this sealed space to prevent the device from being submerged and damaging the water depth calculation unit when the water level is too high.

[0036] The water depth gauge 20 is arranged in the space between the baffle and the water inlet in the waterproof housing 10, and includes a strip circuit board and a plurality of pole pieces 202 spaced apart along the long side of the strip circuit board, each pole piece 202 corresponding to a height value.

[0037] The strip circuit board is a PCB circuit board. The water depth calculation unit detects the capacitance value of each electrode 202 by connecting the circuit with the PCB circuit board, and minimizes the influence of parasitic capacitance on the capacitance detection of the electrode 202 through the wiring of the PCB circuit board.

[0038] Each electrode 202 provided on the PCB board forms a ground capacitor with the ground, which can be regarded as an approximation of a parallel capacitor, where the ground acts as one electrode plate and the electrode plate is equivalent to the other electrode plate, and a capacitance is formed due to the presence of a dielectric (atmosphere and / or insulating material, etc.) between them. When the water level rises and covers the electrode plate, the dielectric constant of the intermediate dielectric changes, causing the capacitance of the capacitor to change. This change can be detected by the capacitance measurement circuit in the water depth calculation unit. The spacing between the electrode plates 202 can be set and adjusted. In the present invention, the electrode plates 202 are arranged at equal intervals on a surface of the PCB circuit board. According to the change in the capacitance of the electrode plates 202 combined with the position information or serial number information of the electrode plates 202, the position of water immersion can be detected. For example, the electrode plates 202 are sorted according to their distance from the water inlet. At this time, the water depth can be calculated based on the serial number multiplied by the spacing plus the width of the electrode plate 202 multiplied by the serial number.

[0039] The water depth calculation unit is electrically connected to each electrode 202 through the strip circuit board, and monitors the capacitance change value of each electrode 202 relative to its initial capacitance value, and uses the height value of the electrode 202 position corresponding to the capacitance change value being greater than a preset immersion threshold as the measured water depth height; when the capacitance change values ​​of at least two non-adjacent electrode pieces 202 are both greater than the preset immersion threshold, the height value of the lowest electrode 202 position is used as the measured water depth height, and the initial capacitance value of the electrode 202 corresponding to the remaining electrode pieces with higher height values ​​and capacitance change values ​​greater than the preset immersion threshold is adjusted so that the capacitance change value between the current capacitance value and the adjusted initial capacitance value is less than the preset immersion threshold.

[0040] In this invention, the water depth calculation unit is a microprocessor (MCU), which includes an oscillator, a water level determination module, a correction module, and a storage module. The oscillator calculates the capacitance of a pole piece by measuring the time required for the capacitor formed between the pole piece and the ground to charge or discharge to a specific voltage. The capacitance of each pole piece 202 on the PCB can be measured individually or simultaneously. The storage module stores the capacitance value of each pole piece 202 in its dry state as the starting capacitance value for each pole piece 202.

[0041] The water level determination module monitors the capacitance change of each electrode relative to its initial capacitance, and uses the height of the electrode position corresponding to the capacitance change greater than a preset immersion threshold as the measured water depth; when the capacitance change values ​​of at least two non-adjacent electrode pieces are both greater than the preset immersion threshold, the height of the lowest electrode position is used as the measured water depth. The following examples are provided for different situations:

[0042] See also Figure 3 -(1), under normal circumstances, when water immersion occurs and the water immerses the m+2th electrode 202, the capacitance values ​​of the 1st to m+2th electrodes 202 will decrease, and the change values ​​all exceed the preset immersion threshold value, while the change values ​​of the m+3rd to nth electrodes 202 are lower than the preset immersion threshold value. At this time, it is determined that the water level has spread to the position of the m+2th electrode 202, and the height can be calculated based on the preset position spacing of the electrodes 202. Under normal circumstances, the water level detection method when the water level drops is the same as the detection method when the water level rises. Even if there is residual water stains that cause individual electrodes 202 to still be determined as flooded, according to the actual situation, the next flooded electrode 202 that is determined to be the electrode 202 that is not submerged at the lowest position is the real water level situation, such as Figure 3-(2), when the water level retreats to the position of the m-2th electrode 202, it is detected that the mth block is flooded and the m+2th block is flooded, and the water level is still determined to be at the m-2th block, but the mth and m+2th electrode 202 are in abnormal states, but this does not affect the accuracy of its measurement.

[0043] In some special cases, such as Figure 3 -(3) shows that the water level rises again from the m-2th block to the m-1th metal block, and the block above it or even multiple blocks above it have water stains continuously, which leads to it being judged as abnormal. At this time, the output water level result is at the mth block, or even the m+1th block. In other words, in the process of repeated measurements, if the abnormal electrode 202 is not processed, it will easily lead to inaccurate water level detection results or even misjudgment. Based on the above situation, the present invention further adjusts the initial capacitance value of the electrode corresponding to the other high-height value whose capacitance change value is greater than the preset immersion threshold through the correction module, so that the capacitance change value between its current capacitance value and the adjusted initial capacitance value is less than the preset immersion threshold.

[0044] When the water level determination module detects an abnormal detection value (a discontinuous electrode 202 covered by water), it activates the correction module. The correction module corrects the initial capacitance value Ck0 of the abnormal electrode k based on the immersion threshold Cky and the current capacitance value Ck1, so that the difference between the current capacitance value Ck1 of the abnormal electrode k and the corrected Ck0 is less than Cky. In this embodiment, the correction must meet two rules: 1. Ck0>=2*Ck1; 2. Cky>=Ck1.

[0045] At this time, each detection will perform initial capacitance correction on the abnormal electrode 202, so that in a water level measurement task, even if repeated measurements are made, no misjudgment will occur, thereby improving the accuracy of the measurement.

[0046] In addition, to facilitate real-time detection, the adaptive water depth detection device also includes a display unit, which is disposed on the waterproof housing 10 and connected to the water depth calculation unit. The water depth calculation unit transmits the detection results to the display unit, which can intuitively display the water depth data at the detection location and assist the detection personnel in determining the precipitation situation.

[0047] Compared with the prior art, the water depth calculation unit of the adaptive water depth detection device of embodiment 1 of the present invention introduces an adaptive dynamic correction method to continuously detect changes in electrode capacitance, and dynamically adjusts the starting capacitance of electrodes suspected of having impurities or residual water, thereby ensuring the accuracy of repeated water level detection and improving the water depth detection precision, accuracy and anti-interference ability of the water depth detection device.

[0048] Example 2:

[0049] During the test of Example 1, the inventor also found that the gap between the electrodes 202 of this device and those of the existing detection devices was too large. Considering the width of the electrode 202 itself, if the water level spread between the two electrodes 202, the water depth might be at any position of the two electrodes 202, which affected the measurement accuracy of the water depth. Regarding the problem of insufficient measurement accuracy of the device itself, if only the electrode 202 was made smaller, it would affect its physical properties (such as hardness and anti-interference ability); while reducing the distance between the two electrodes 202, the distance between the two electrodes 202 might be too small, which could cause electronic disturbances and affect the capacitance change.

[0050] Therefore, the present invention makes the following improvements to the water depth detector:

[0051] Please refer to Figure 4 , in this Example 2, the electrodes 202 are arranged at intervals on both the front and back surfaces of the strip-shaped circuit board, and the positions of the electrodes 202 on the front surface of the strip-shaped circuit board do not coincide with those on the back surface of the strip-shaped circuit board in a staggered manner. As a preferred method, the electrodes 202 on the front and / or back surfaces of the strip-shaped circuit board are arranged at equal intervals.

[0052] The water depth detector includes a strip-shaped circuit board 201 and multiple equally wide parallel electrodes 202 arranged from bottom to top and printed on the front and back surfaces (A and B surfaces) of the strip-shaped circuit board; there is a gap with a width of D (D >= 1 mm) between every two electrodes 202, and the thin blocks are not electrically connected. When water enters through the water inlet of the waterproof housing 10 and contacts or approaches the electrode 202, the capacitance value between the electrode 202 and the ground will increase. At this time, the water depth calculation unit can determine whether there is water approaching or contacting the electrode 202 by detecting the change in the capacitance value. The electrodes 202 of the present invention are distributed on both the front and back surfaces of the strip-shaped circuit board. The thin blocks on the front surface are numbered 1, 3, 5... with odd numbers, and the thin blocks on the back surface are numbered 2, 4, 6... with even numbers. The total number of electrodes 202 is n (n is an even number). The height of the electrode 202 is H (H >= 2 mm), the distance between the thin blocks on the same surface is D (D >= 1 mm), and the thin blocks with odd and even numbers are arranged in a staggered and equally spaced array along the longitudinal direction of the circuit board. When D >= H, the water level detection range of this device is: n*(D + H), and the error is from -D to ; when D < H, the water level detection range of the present invention is: The error is between and . By alternately arranging the electrodes 202 on both sides of the strip-shaped circuit board 201, the measurement error can be controlled within a smaller range, improving the measurement accuracy. And because they are arranged on both the front and back surfaces, there is still enough space between the electrodes 202 on one side, and no electronic interference between devices will occur.

[0053] Through the aforementioned improvements to the water depth gauge, the strip-shaped circuit board and the multiple electrodes disposed thereon are combined in a design that allows the electrodes to be evenly spaced on both the front and back sides of the circuit board; and the electrodes on the front side of the strip-shaped circuit board are staggered and do not overlap. This arrangement allows water level detection to be performed based on the capacitance changes of the electrodes on both the front and back sides, keeping measurement errors within a smaller range, improving measurement accuracy, and avoiding situations where the spacing between the electrodes is too small, causing electronic disturbances that could affect capacitance measurement.

[0054] Example 3:

[0055] Regarding the improvements to Example 2, the inventors discovered that an increased number of electrodes 202 will increase the probability that floating objects and dust in the water will adhere to the surface of the electrode 202 as the water level fluctuates. When the surface of the electrode 202 is covered with a certain thickness of floating objects and dust, the actual capacitance value of the electrode 202 will be significantly different from that of the state without debris due to the ability of the dust on the surface to absorb water. When the air humidity increases, this difference will be amplified. For example, a completely clean electrode 202 is completely covered by water, and the capacitance change value is d, while a electrode 202 covered with a certain thickness of floating objects and dust only needs to be covered by water for 1 / 3 of its area to achieve the same capacitance change value. Therefore, the floating objects and dust covering the surface of the electrode 202 will affect the accuracy of its capacitance change and thus affect the measurement results. Therefore, in order to solve the problem of dust and the influence of floating objects, the present invention further optimizes the adaptive water depth device.

[0056] See also Figure 5 In embodiment 3 of the present invention, the adaptive water depth detection device further includes a plurality of water baffles 30; the water baffles 30 are spaced apart and tightly fitted on the water depth detection ruler, the water depth detection ruler is mounted in the waterproof housing 10 through the water baffles 30, and a drainage gap is provided between the water baffles 30 and the inner wall of the waterproof housing 10.

[0057] See also Figure 6 , wherein four connecting columns 301 are respectively provided at the four ends on the diagonal line of each water baffle 30; the water depth detection ruler passes through the middle of the water baffle 30, and its strip circuit board fits tightly against the water baffle 30; the four connecting columns 301 are respectively fixed on the waterproof shell 10, and the drainage gap is formed between the two connecting columns 301 and the side edges of the corresponding water baffle 30 and the inner wall of the waterproof shell 10.

[0058] In this embodiment, three water baffles 30 are included, wherein the first water baffle 30 is close to the bottom of the waterproof shell 10, and the strip circuit board 201 vertically passes through the middle of the first water baffle 30; the second water baffle 30 is close to the middle of the strip circuit board and has no direct contact with the inner wall of the waterproof shell 10, and the strip circuit board vertically passes through the middle of the second water baffle 30; the third partition is close to the top of the strip circuit board and has no direct contact with the inner wall of the waterproof shell 10, and the strip circuit board vertically passes through the middle of the third water baffle 30.

[0059] Through the above design, when the water level in the adaptive water depth detection device drops, when the water in the volume of the waterproof housing 10 flows out, the water flow velocity on the surface of the strip circuit board will be lower than the water flow velocity on the side of the water baffle 30. At this time, small particles of impurities in the water will flow out along the path with fast water flow, reducing the probability of impurities adhering to the surface of the strip circuit board and the thin metal block, and improving the accuracy of water level measurement caused by the accumulation of residues on the surface of the strip circuit board after the device has been repeatedly in and out of water.

[0060] Preferably, in order to make the water flow velocity on the surface of the strip circuit board much lower than the water flow velocity at the edge of the water baffle 30 and further prevent small particles of impurities in the water from being adsorbed on the pole piece 202, the side of the water baffle 30 is set to an arc convex surface.

[0061] Any of the three embodiments above can improve the detection accuracy and precision of the existing water depth detection device, and can also better improve the water level detection accuracy of the water depth detection device by combining two or even three of them; you can choose according to your specific needs and usage scenarios.

[0062] The present invention can also add a communication unit on the basis of any of the above-mentioned adaptive water depth detection devices, and connect it with an Internet of Things platform to form an adaptive water depth detection system, which becomes a component of the urban waterlogging alarm and dispatching system.

[0063] The adaptive water depth detection device transmits real-time water depth data to the urban flood warning and dispatching system platform via the MQTT protocol. The platform then transmits this real-time water depth data to outdoor LED screens at the corresponding locations, displaying the real-time water level to the public. Such LED screens are ideal for installation at tunnel entrances, allowing the public to intuitively assess the water depth within the tunnel and avoid dangerous situations such as forcing through the water without knowing the depth.

[0064] The adaptive water depth detection system of the present invention can display the water depth information reported by each detection device in real time on a geographic information system. It continuously records detection points with flooding, calculates the rate of water level change, and aggregates the location information of detection points where the water level exceeds a certain level or where the water level rises and falls rapidly to generate real-time warning information.

[0065] Because flooding incidents occur less frequently, in order to save energy, the detection device of the present invention has two operating modes: power-saving mode and normal mode. The power-saving mode operates when there is no flooding on the road. In this mode, the device and the cloud server only maintain a low communication frequency, for example, once every hour. The normal mode operates when it is necessary to detect the water level depth, that is, when it is raining, for example, once every minute. The switching between power-saving mode and normal mode is performed automatically by the device, or the cloud server can actively send a switching instruction to the detection device to switch. The device determines whether the device is operating in power-saving mode or normal mode based on whether there is flooding at the lowest detection position. When there is no flooding at the lowest detection position, the device immediately switches to power-saving mode, and the system enters sleep mode. When the next communication time arrives, the system wakes up, performs a water level detection, and communicates with the server. In the sleep state, the detection device can be triggered by the capacitance threshold of the lowest water level detection point to wake up the device and enter the normal state. The time interval between power-saving mode and normal mode can be adjusted by the cloud server sending a command to the detection device.

[0066] The information uploaded by the detection devices is stored in a database on the management platform and is continuously updated. The management platform provides APIs to third-party systems, such as traffic police dispatch platforms and map navigation software, which can access real-time flood warning information for each road (location). This information provides information for traffic dispatch and driver navigation, enabling data sharing within the urban waterlogging system.

[0067] The present invention provides an adaptive water depth detection device. By communicating with an Internet of Things platform through multiple adaptive water depth detection devices, an urban water depth detection system can be constructed. By obtaining real-time information from the adaptive water depth detection devices on each road (location), information is provided for traffic scheduling and driving navigation, thereby realizing the sharing of urban waterlogging system data.

[0068] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. An adaptive water depth detection device, characterized in that: include: a waterproof housing; A water depth measuring ruler is provided in the waterproof housing and includes a strip circuit board and a plurality of pole pieces spaced apart along the long side of the strip circuit board, each pole piece corresponding to a height value and a plurality of water baffles; a water depth calculation unit connected to each electrode piece via the strip circuit board, monitoring the capacitance change of each electrode piece relative to its initial capacitance value, and using the height of the electrode piece position corresponding to the capacitance change value being greater than a preset immersion threshold as the measured water depth; When the capacitance change values ​​of at least two non-adjacent electrode pieces are both greater than the preset immersion threshold, the height value of the lowest electrode piece position is used as the measured water depth height, and the initial capacitance values ​​of the electrode pieces with higher capacitance change values ​​greater than the preset immersion threshold are adjusted so that the capacitance change value between the current capacitance value and the adjusted initial capacitance value is less than the preset immersion threshold; The electrode pieces are evenly spaced apart on the front and back sides of the strip-shaped circuit board, and the positions of the electrode pieces on the front side of the strip-shaped circuit board and the electrode pieces on the back side of the strip-shaped circuit board are staggered and do not overlap; The water baffle is spaced apart and sleeved on the water depth gauge and fits tightly therewith. The water depth gauge is mounted in the waterproof housing through the water baffle, and a drainage gap is provided between the water baffle and the inner wall of the waterproof housing. Among them, four connecting columns are respectively provided at the four ends on the diagonal line of each water baffle; the water depth detection ruler passes through the middle part of the water baffle, and its strip circuit board is tightly fitted with the water baffle; the four connecting columns are respectively fixed on the waterproof shell, and the drainage gap is formed between the two connecting columns and the side edges of the corresponding water baffle and the inner wall of the waterproof shell.

2. The adaptive water depth detection device according to claim 1, characterized in that: The side edge of the water retaining plate is an arc convex surface.

3. The adaptive water depth detection device according to claim 2, characterized in that: The bottom of the waterproof shell is a water inlet, and a filter is provided at the water inlet.

4. The adaptive water depth detection device according to claim 3, characterized in that: The upper portion of the waterproof housing forms a sealed space with the inner wall of the housing through a water-blocking plate, and the water depth calculation unit is arranged in the sealed space.

5. The adaptive water depth detection device according to claim 4, characterized in that: It also includes a display unit, which is arranged on the waterproof housing and connected to the water depth calculation unit.

6. The adaptive water depth detection device according to claim 5, characterized in that: The pole piece is coated with a waterproof coating.

7. An adaptive water depth detection system, characterized in that: include: Multiple adaptive water depth detection devices and an Internet of Things platform according to any one of claims 1 to 6, wherein each of the adaptive water depth detection devices is further provided with a communication unit, and each communication unit is connected to the Internet of Things platform.

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