Self-adaptive water depth detection device and detection system

Abstract

The invention relates to a self-adaptive water depth detection device and system, and the device comprises a waterproof housing. The water depth detection ruler is arranged in the waterproof shell and comprises a strip-shaped circuit board and a plurality of pole pieces which are arranged along the long edge direction of the strip-shaped circuit board at intervals; the water depth calculation unit is connected with each pole piece through the strip-shaped circuit board and monitors the capacitance change value of the current capacitance value of each pole piece relative to the initial capacitance value of the pole piece; when the capacitance change values of at least two non-adjacent pole pieces are greater than the immersion threshold value, taking the height value of the lowest pole piece position as the actual water depth height, and adjusting the initial capacitance values of the other pole pieces with the capacitance change values greater than the preset immersion threshold value, the capacitance change value of the current capacitance value and the adjusted initial capacitance value is smaller than the preset immersion threshold value, the initial capacitance value of the pole piece is continuously and dynamically adjusted in the water depth measurement process, and the measurement precision is improved.

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 waterlogging monitoring systems in smart cities.

[0004] As for physical buoy detection, a physical buoy is set on the water surface, and the water depth is detected by detecting the height of the physical buoy. However, it not only has the problems of 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 waterlogging monitoring system in smart cities.

[0005] Capacitive water level detection, the basic principle of detecting water depth is that the dielectric constant of capacitors in different media is different, resulting in changes in their capacitance values. Figure 1 As shown, an existing capacitive water level detection ruler includes a waterproof shell 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 pole piece forms a capacitor with the ground. When water enters the device from the lower end of the waterproof shell 1, there are two media in the capacitor at this time, namely air and water, and the air is located at the top and the water is 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 value of the pole piece-to-ground capacitor changes. In this way, by detecting the corresponding changes in the real-time capacitance of each pole piece, combined with the height information of each pole piece, or the position information, the water inflow 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 a 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, which is arranged in the waterproof housing, comprises a strip circuit board and a plurality of pole pieces arranged at intervals along the long side direction of the strip circuit board, each pole piece 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 greater than a preset immersion threshold as the measured water depth height; when there are at least two non-adjacent electrode pieces whose capacitance change values ​​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 the remaining high height values ​​whose capacitance change values ​​are 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.

[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 pole pieces are arranged at equal intervals on the front and back sides of the strip circuit board, and the positions of the pole pieces on the front side of the strip circuit board and the pole pieces on the back side of the strip circuit board are staggered and do not overlap.

[0013] The strip circuit board and a plurality of electrodes arranged on the circuit board are combined and designed so that the plurality of electrodes are evenly spaced on the front and back sides of the circuit board, and the positions of the electrode pieces located on the front side of the strip circuit board and the electrode pieces 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 electrode pieces 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 particle impurities in the water will flow out along the fast flow path, reducing the probability 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 net 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 also includes a display unit, which is arranged 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 communicating with multiple adaptive water depth detection devices and connecting them to the Internet of Things platform, 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 It is a structural schematic 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 in a water level detection process provided by the present invention;

[0027] Figure 4A partial structural perspective view of an exemplary water depth measuring ruler 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 measuring ruler; 201: strip circuit board; 202: pole piece; 30: water retaining plate; 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 is 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 on the surface after the water recedes, which causes the current capacitance after being contaminated 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, which improves the judgment method of the water depth calculation unit to evaluate the water level, continuously identifies the contaminated electrodes during the water level detection process, and adjusts the initial capacitance values ​​of these contaminated electrodes so that the capacitance change value between the current capacitance value and the adjusted initial capacitance value is less than a preset immersion threshold, thereby improving the accuracy of the water level detection. The specific description is given in the following embodiment 1.

[0033] Embodiment 1:

[0034] See also Figure 2 , Figure 2 The structure block 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 closed housing, and the shape of the housing can be a cylinder or a cube, which is set according to actual needs. In the present invention, a square housing is used as an exemplary description. The bottom of the housing is a water inlet for water inlet and outlet; a filter is provided at the water inlet of the waterproof housing 10 to prevent larger impurities from entering the device and damaging the device. A sealed space is formed at the upper part of the waterproof housing 10 through a water baffle and the inner wall of the housing, and the water depth calculation unit is arranged in the sealed space to prevent the water from flooding the equipment when the water level is too high, causing damage to the water depth calculation unit.

[0036] The water depth measuring ruler 20 is arranged in the space between the water-blocking plate and the water inlet in the waterproof housing 10, and includes a strip circuit board and a plurality of pole pieces 202 arranged at intervals along the long side direction of the strip circuit board, and each pole piece 202 corresponds to a height value.

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

[0038] Each pole piece 202 arranged 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 a pole plate, and the pole piece is equivalent to another pole plate, and a capacitor 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 pole piece, 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 pole pieces 202 can be set and adjusted. In the present invention, the pole pieces 202 are arranged at equal intervals on a surface of the PCB circuit board. According to the change in the capacitance of the pole piece 202 combined with the position information or serial number information of the pole piece 202, the position of water immersion can be detected. For example, the pole piece 202 is sorted according to the distance from the water inlet. At this time, the water depth can be calculated according to the serial number multiplied by the spacing plus the width of the pole piece 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 there are at least two non-adjacent electrode 202 positions whose capacitance change values ​​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 high height values ​​whose capacitance change values ​​are 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] The water depth calculation unit in the present invention is an MCU (microprocessor), which includes an oscillator, a water level judgment module, a correction module and a storage module. The oscillator calculates the capacitance value corresponding to the 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 circuit board can be measured one by one, or the capacitance of all pole pieces 202 can be measured at the same time. The storage module stores the capacitance value of each pole piece 202 in a dry state as the starting capacitance value of each pole piece 202.

[0041] The water level judgment module 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 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 greater than the preset immersion threshold, the height value of the lowest electrode position is used as the measured water depth. The following examples are given for different situations:

[0042] See also Figure 3 -(1), under normal circumstances, when flooding occurs and water submerges the m+2th electrode 202, the capacitance values ​​of the 1st to m+2th electrodes 202 will decrease, and the change values ​​will all exceed the preset submergence threshold value, while the change values ​​of the m+3rd to nth electrode 202 will be lower than the preset submergence 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 electrode 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 be still determined to be 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 piece 202, it is detected that the mth block is flooded and the m+2th block is flooded. The water level is still determined to be at the m-2th block, but the mth and m+2th electrode pieces 202 are in abnormal states. However, this does not affect the accuracy of the measurement.

[0043] In some special cases, such as Figure 3 -(3), 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 continuous water stains and are judged to be 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 capacitance change values ​​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 judgment module detects an abnormal detection value (discontinuous electrode 202 is covered by water), the correction module will be started. The correction module corrects the initial capacitance value Ck0 of the abnormal electrode k according to 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 piece 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, in order to facilitate real-time detection, the adaptive water depth detection device also includes a display unit, which is arranged on the waterproof housing 10 and connected to the water depth calculation unit. The water depth calculation unit transmits the detected result to the display unit, which can intuitively reflect the water depth data of the detection location and assist the detection personnel in judging the precipitation situation.

[0047] Compared with the prior art, the water depth calculation unit of the adaptive water depth detection device of Example 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 capability of the water depth detection device.

[0048] Embodiment 2:

[0049] During the test of Embodiment 1, the inventor also found that the gap between the electrodes 202 of this device and those of the existing detection devices is too large. Considering the width of the electrode 202 itself, if the water level spreads between the two electrodes 202, the water depth may be at any position between the two electrodes 202, which affects the measurement accuracy of the water depth. Regarding the problem of insufficient measurement accuracy of the device itself, if only the electrode 202 is made smaller, it will 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 may be too small, resulting in electronic disturbance and affecting the capacitance change.

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

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

[0052] The water depth detection ruler includes a strip-shaped circuit board 201 and multiple equally wide and parallel electrodes 202 arranged from bottom to top and printed on the front and back (A and B sides) 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 of the strip-shaped circuit board. The thin blocks on the front are numbered 1, 3, 5... with odd numbers, and the thin blocks on the back 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 side 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, there is still enough space between the electrodes 202 on one side, and no electronic interference will occur between the devices.

[0053] Through the above-mentioned improvement of the water depth detection ruler, the strip circuit board and the multiple pole pieces arranged on the circuit board are combined and designed, so that the multiple pole pieces are evenly spaced on the front and back of the circuit board; and the positions of the pole pieces located on the front of the strip circuit board and the pole pieces located on the back of the strip circuit board are staggered and do not overlap. Through this arrangement, water level detection can be performed by relying on the capacitance changes of the pole pieces on the front and back sides, so that the measurement error is controlled within a smaller range, the measurement accuracy is improved, and the situation that the setting interval between the pole pieces is too small, resulting in electronic disturbance, which affects the capacitance measurement, is avoided.

[0054] Embodiment 3:

[0055] Regarding the improvement of Example 2, the inventors found that the increased number of pole pieces 202 will cause the probability of floating objects and dust in the water body to adhere to the surface of the pole piece 202 as the water level fluctuates. When the surface of the pole piece 202 is covered with a certain thickness of floating objects and dust, the actual capacitance value of the pole piece 202 will be greatly different from the state of not covering the debris because the dust on the surface has the ability to absorb water. When the air humidity increases, this difference will be amplified. For example: a completely clean pole piece 202 is completely covered by water, and the capacitance change value is d, while a pole piece 202 covered with a certain thickness of floating objects and dust only needs to be covered by water for 1 / 3 of the area to achieve the same capacitance change value. Therefore, the floating objects and dust covered on the surface of the pole piece 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 comprises 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 drainage gaps are provided between the water baffles 30 and the inner wall of the waterproof housing 10.

[0057] See also Figure 6 Each water baffle 30 includes a water baffle 30 and four connecting columns 301 respectively arranged at the four ends of the diagonal of the water baffle 30; the water depth detection ruler passes through the middle of the water baffle 30, and its strip circuit board is tightly fitted on 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 plate 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 shell 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 velocity, reducing the probability of impurities adhering to the surface of the strip circuit board and the metal thin 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 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 dispatching system.

[0063] The adaptive water depth detection device sends the monitored water depth data to the urban waterlogging alarm dispatch system platform in real time through the MQTT protocol. The platform sends the real-time water depth data to the outdoor LED screen at the corresponding location to show the real-time water level to the public. This LED screen is suitable for installation at the tunnel entrance, allowing the public to intuitively judge the water depth in the tunnel and avoid forcing through the water without knowing the water depth, which may cause danger.

[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 the geographic information system. It continuously records the detection points where flooding occurs, calculates the water level change rate, and summarizes the location information of the detection points where the water level exceeds a certain level and the water level rises and falls quickly to generate real-time warning information.

[0065] Since the frequency of flooding events is relatively low, in order to achieve energy saving, 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, only a low communication frequency is maintained between the device and the cloud server, for example: communication once every 1 hour. The normal mode operates when it is necessary to detect the depth of the water level, that is, when it rains, for example: communication once every 1 minute. The switching between the power saving mode and the normal mode is automatically performed 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 the power saving mode or the 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 the energy saving mode, and the system enters the 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 the power saving mode and the normal mode can be adjusted by the cloud server sending instructions to the detection device.

[0066] The information uploaded by the detection device is stored in the management platform in the form of a database and is continuously updated. The management platform provides API interfaces to third-party systems, such as traffic police dispatch platforms, map navigation software, etc., which can obtain real-time flood warning information points of each road (location), provide information for traffic dispatch and driving navigation, and realize the sharing of urban waterlogging system data.

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

[0068] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An adaptive water depth detection device, characterized in that: include: A waterproof housing; A water depth measuring ruler, which is arranged in the waterproof housing, comprises a strip circuit board and a plurality of pole pieces arranged at intervals along the long side direction of the strip circuit board, each pole piece corresponding to a height value; a water depth calculation unit, which is connected to each electrode piece through the strip circuit board, and monitors the capacitance change value of each electrode piece relative to its initial capacitance value, and takes the height value of the electrode piece 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 electrodes are 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 electrodes whose capacitance change values ​​of the remaining high height values ​​are 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.

2. The adaptive water depth detection device according to claim 1, characterized in that: The pole pieces are arranged at equal intervals on the front and back sides of the strip-shaped circuit board, and the positions of the pole pieces on the front side of the strip-shaped circuit board and the pole pieces on the back side of the strip-shaped circuit board are staggered and do not overlap.

3. The adaptive water depth detection device according to any one of claims 1-2, characterized in that: Also includes: A plurality of water baffles; the water baffles are spaced and sleeved on the water depth detection gauge and fit closely therewith; the water depth detection gauge 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.

4. The adaptive water depth detection device according to claim 3, characterized in that: Each water baffle includes a water baffle and four connecting columns respectively arranged at the four ends of the diagonal line of the water baffle; the water depth detection ruler passes through the middle of the water baffle, and its strip circuit board fits tightly on 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.

5. The adaptive water depth detection device according to claim 4, characterized in that: The side edge of the water retaining plate is an arc convex surface.

6. The adaptive water depth detection device according to claim 5, characterized in that: The bottom of the waterproof shell is a water inlet, and a filter net is arranged at the water inlet.

7. The adaptive water depth detection device according to claim 6, characterized in that: The upper part of the waterproof shell forms a sealed space with the inner wall of the shell through a water-blocking plate, and the water depth calculation unit is arranged in the sealed space.

8. The adaptive water depth detection device according to claim 6, characterized in that: It also includes a display unit, which is arranged on the waterproof housing and connected to the water depth calculation unit.

9. The adaptive water depth detection device according to claim 7, characterized in that: The pole piece is coated with a waterproof coating.

10. An adaptive water depth detection system, characterized in that: include: A plurality of adaptive water depth detection devices as described in any one of claims 1-9, and an Internet of Things platform, 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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