A risk warning method and device for rain and flood discharge roads

Abstract

The present invention relates to the technical field of traffic flood warning, and in particular to a method and device for early warning of risks on rain and flood roads. The method for early warning of risks on rain and flood roads is applied to a risk warning device and comprises the following steps: obtaining a water depth value; judging whether the water depth value is greater than a first water depth value, and if so, obtaining a water flow velocity; determining a risk level according to the water depth value and the water flow velocity; and making a graded risk alarm according to the risk level, so as to monitor the water conditions on rain and flood roads and make corresponding alarms for different risk levels, so as to avoid pedestrians who cannot accurately judge the water conditions and blindly wade into the water, bringing risks to their own safety.

Description

Technical Field

[0001] The present invention relates to the technical field of traffic flood warning, and in particular to a method and device for warning the risk of rain and flood discharge roads. Background Art

[0002] At present, with the frequent occurrence of extreme weather, waterlogging on many roads has brought great inconvenience to people's travel, especially when the water is deep and the water flow is fast, which seriously threatens the safety of pedestrians and vehicles on the road.

[0003] There are several existing water accumulation warning devices for detecting water accumulation in tunnels, but it is quite one-sided to judge the risk only by the single condition of water accumulation depth. Water flow with low water depth and high flow rate also has a greater risk, but if only relying on water accumulation depth as the basis for judgment, it is impossible to identify the road risk under such conditions. Due to the lack of understanding of water conditions when pedestrians pass through flooded sections on rainy days, it is difficult to effectively guarantee the safety of passage. The present invention proposes a device that makes risk judgments on road flooding based on flow rate and water level detection and calculation, and gives warnings to passers-by. It is used to provide road safety warnings to pedestrians in low-lying sections and steep slope sections where water accumulation is prone to occur during heavy rains. Summary of the invention

[0004] The purpose of the present invention is to provide a method and device for early warning of rain and flood discharge road risks, so as to solve the problem that pedestrians cannot accurately judge the water situation and blindly wade into the water, which brings risks to their own safety.

[0005] An embodiment of the present invention provides a risk warning method for a rain and flood discharge road, which is applied to a risk warning device. The method comprises the following steps:

[0006] Get the water depth value;

[0007] Determine whether the water depth value is greater than the first water depth value, and if so, obtain the water flow velocity;

[0008] Determining a risk level according to the water depth value and the water flow velocity;

[0009] According to the risk level, a graded risk alarm is issued.

[0010] Optionally, before the step of determining whether the water depth value is greater than the first water depth value, the following steps are included:

[0011] It is determined whether the water depth value is greater than the second water depth value and less than or equal to the first water depth value. If so, it is determined to be the first risk level.

[0012] Optionally, before the step of determining whether the water depth value is greater than the first water depth value, the following steps are included:

[0013] Determine whether the water depth value is greater than or equal to the second water depth value and less than or equal to the first water depth value, and if so, control the risk warning device to be in a working state and execute the first frequency monitoring mode;

[0014] Determine whether the water depth value is greater than the first water depth value, and if so, control the risk warning device to be in a working state and execute the second frequency monitoring mode;

[0015] Determine whether the water depth value is less than the second water depth value, and if so, control the risk warning device to be in a closed state;

[0016] The first frequency is smaller than the second frequency.

[0017] Optionally, determining the risk level according to the water depth value and the water flow velocity comprises the following steps:

[0018] Determining a risk index according to the water depth value and the water flow velocity;

[0019] Determine whether the risk index is less than a first risk index threshold, and if so, determine it as a second risk level;

[0020] Determine whether the risk index is greater than or equal to the first risk index threshold and less than or equal to the second risk index threshold, and if so, determine it as the third risk level;

[0021] Determine whether the risk index is greater than the second risk index threshold, and if so, determine it as the fourth risk level.

[0022] Optionally, determining the risk index according to the water depth value and the water flow velocity comprises the following steps:

[0023] Determine the risk index according to the water depth value and the water flow velocity by using a risk index calculation formula;

[0024] The risk index calculation formula is:

[0025]

[0026] and / or,

[0027] Among them, R X1 is the slip risk index, R X2 is the capsizing risk index, and the larger value among the risk indexes is taken as the basis for risk judgment, which is recorded as the risk index R X , C d is the flow resistance coefficient, v is the water velocity, A is the area of ​​the submerged part of the human body facing the water flow, g is the gravitational acceleration, μ is the static friction coefficient, V Tis the total volume of the human body, V P is the volume of the submerged part of the human body, D is the water depth value, and Ls is the stabilizing force arm; the headwind area of ​​the submerged part of the human body and the volume of the submerged part of the human body are obtained according to the water depth value and the standard human body data, and the flow resistance coefficient is obtained according to the water depth value and the water flow velocity; the stabilizing force arm is obtained according to the standard human body data.

[0028] Optionally, performing a graded risk alarm according to the risk level comprises the following steps:

[0029] Determining whether the risk level is greater than or equal to the second risk level;

[0030] If not, the blue light continues to flash at the first flashing frequency.

[0031] Optionally, according to the risk level, a graded risk alarm is performed, comprising the following steps:

[0032] Determining whether the risk level is greater than or equal to the second risk level;

[0033] If yes, it determines whether there are pedestrians in the preset area. If yes, it executes flash alarm and voice alarm according to the risk level.

[0034] Optionally, the step of executing flash alarm and voice alarm according to the risk level comprises the following steps:

[0035] If the risk level is the second risk level, the blue light flashes continuously at the second flashing frequency, and the voice broadcast of the first number is repeated periodically;

[0036] If the risk level is the third risk level, the orange light flashes continuously at the third flash frequency, and the voice broadcast of the second number is repeated periodically;

[0037] If the risk level is the fourth risk level, the red light flashes continuously at the fourth flashing frequency, and the voice announcement is repeated periodically for the third number;

[0038] Among them, the first flash frequency is less than or equal to the second flash frequency, less than or equal to the third flash frequency, less than or equal to the fourth flash frequency, and the first number is less than the second number, less than the third number.

[0039] Compared with the prior art, the rain and flood discharge road risk early warning method provided by the present invention has the following beneficial effects:

[0040] The risk warning method for rain and flood discharge roads provided by the embodiment of the present invention obtains a water depth value; determines whether the water depth value is greater than a first water depth value, and if so, further obtains a water flow velocity; determines the risk level according to the water depth value and the water flow velocity; and then issues a risk alarm according to the risk level. According to the above method, the water conditions of rain and flood discharge roads are monitored and corresponding risk alarms are issued for different risk levels, so as to avoid pedestrians from blindly wading through water and bringing risks to their own safety due to the inability to accurately judge the water conditions.

[0041] The embodiment of the present invention provides a rain and flood discharge road risk warning device, which is used to implement the above-mentioned warning method, and the device includes:

[0042] A main frame, and a main engine, a water depth monitoring device, a flow rate monitoring device and an alarm arranged on the main frame;

[0043] The water depth monitoring device is used to monitor the water depth value;

[0044] The flow rate monitoring device is used to monitor the flow rate of water;

[0045] The alarm is used for risk alarm;

[0046] The host is electrically connected to the water depth monitoring device, flow rate monitoring device and alarm, and is used to obtain the water depth value and water flow rate, and determine the risk level according to the water depth value and water flow rate, and issue a risk alarm.

[0047] Optionally, the host further comprises: an electrically connected circuit board, a battery and a communication antenna;

[0048] And / or, the water depth monitoring device includes: a radar water depth sensor or a pressure level monitoring device;

[0049] And / or, the flow rate monitoring device includes: a radar velocity sensor or a slurry flow meter;

[0050] And / or, the alarm includes at least one of a flash alarm and a sound alarm;

[0051] And / or, the main support is also provided with a solar panel, a pedestrian monitoring radar and a runoff awakening device; the solar panel is electrically connected to the battery; the pedestrian monitoring radar is electrically connected to the host to monitor whether there are pedestrians in a preset area; the runoff awakening device is electrically connected to the host to activate the water depth monitoring device.

[0052] The beneficial effect of the storm flood discharge road risk warning device provided by the present invention is that it can achieve the same technical effect as the storm flood discharge road risk warning method mentioned above, and will not be described here to avoid repetition. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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 embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0054] Figure 1 A schematic flow chart of a rain and flood discharge road risk warning method provided by an embodiment of the present invention;

[0055] Figure 2 A schematic diagram of the risk of overturning and instability of a rain and flood discharge road in an embodiment of the present invention;

[0056] Figure 3 A schematic diagram of a human body model structure of a rainwater discharge road in an embodiment of the present invention;

[0057] Figure 4 This is a schematic diagram of a static friction coefficient experiment of a rainwater drainage road in an embodiment of the present invention;

[0058] Figure 5 It is a structural schematic diagram of a rain and flood discharge road risk warning device in an embodiment of the present invention;

[0059] Figure 6 It is a modular schematic diagram of a rain and flood discharge road risk warning device in an embodiment of the present invention;

[0060] Figure 7 This is a schematic diagram of the structure of a runoff awakening device of a rain and flood discharge road risk warning device in an embodiment of the present invention;

[0061] Figure 8 It is a schematic structural diagram of a radar version of a rain and flood discharge road warning instrument of a rain and flood discharge road risk warning system in an embodiment of the present invention;

[0062] Fig. 9 This is a schematic diagram of the main structure of a rain and flood discharge road risk warning device in an embodiment of the present invention;

[0063] Fig.10 It is a schematic structural diagram of a portable rain and flood discharge road warning instrument of a rain and flood discharge road risk warning system in an embodiment of the present invention. DETAILED DESCRIPTION

[0064] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0065] The embodiment of the present invention provides a rain and flood discharge road risk warning method, which is applied to a risk warning device, such as Figure 1As shown, the method comprises the following steps:

[0066] S110, obtaining a water depth value;

[0067] S120, determining whether the water depth value is greater than the first water depth value, and if so, obtaining the water flow velocity;

[0068] S130, determining the risk level according to the water depth value and the water flow velocity;

[0069] Specifically, a risk index is calculated according to the water depth value and the water flow velocity, and the risk level is determined by comparing the risk index with a preset index threshold.

[0070] S140, performing graded risk alarm according to the risk level.

[0071] The risk warning method for rain and flood discharge roads provided by the embodiment of the present invention obtains a water depth value; determines whether the water depth value is greater than a first water depth value, and if so, further obtains a water flow velocity; determines the risk level according to the water depth value and the water flow velocity; and then issues a risk alarm according to the risk level. According to the above method, the water conditions of rain and flood discharge roads are monitored and corresponding risk alarms are issued for different risk levels, so as to avoid pedestrians from blindly wading through water and bringing risks to their own safety due to the inability to accurately judge the water conditions.

[0072] In the embodiment of the present invention, before the above step S120, the following steps are included:

[0073] S112, determining whether the water depth value is greater than the second water depth value and less than or equal to the first water depth value, and if so, determining it as the first risk level.

[0074] In this way, when the water depth of the flood discharge road is greater than the second water depth value and less than or equal to the first water depth value, the water situation is determined to be the first risk level. The accumulated water under the first risk level poses a risk to children traveling, but is basically risk-free for adults. The purpose is to warn children and parents with children.

[0075] In the embodiment of the present invention, before the above step S120, the following steps are included:

[0076] S114, determining whether the water depth value is greater than or equal to the second water depth value and less than or equal to the first water depth value, if so, controlling the risk warning device to be in a working state and executing the first frequency monitoring mode;

[0077] S116, determining whether the water depth value is greater than the first water depth value, and if so, controlling the risk warning device to be in a working state and executing the second frequency monitoring mode;

[0078] S118, determining whether the water depth value is less than the second water depth value, if so, controlling the risk warning device to be in a closed state;

[0079] The first frequency is smaller than the second frequency.

[0080] In this way, the working state of the risk warning device is determined according to the water depth value of the storm water discharge road; when the water depth value of the storm water discharge road is greater than or equal to the second water depth value and less than or equal to the first water depth value, the first frequency monitoring mode is executed; when the water depth value of the storm water discharge road is greater than the first water depth value, the second frequency monitoring mode is executed; the rational allocation and utilization of resources is achieved and it is ensured that the risk is monitored accurately and timely when the water depth value of the storm water discharge road is greater than the first water depth value.

[0081] In the embodiment of the present invention, the above step S130 includes the following sub-steps:

[0082] S132, determining a risk index according to the water depth value and the water flow velocity; specifically, this step includes: determining the risk index according to the water depth value and the water flow velocity by using a risk index calculation formula;

[0083] The risk index calculation formula is:

[0084] According to the water depth value and water flow velocity, the risk index is determined by using the risk index calculation formula;

[0085] The risk index calculation formula is:

[0086]

[0087] Among them, R X1 is the slip risk index, R X2 is the capsizing risk index, and the larger value of the risk index is taken as the basis for risk judgment, which is recorded as the risk index R X , C d is the flow resistance coefficient, v is the water velocity, A is the area of ​​the submerged part of the human body facing the water flow, g is the gravitational acceleration, μ is the static friction coefficient, V T is the total volume of the human body, V P is the volume of the submerged part of the human body, D is the water depth, and Ls is the stabilizing force arm; the headwind area and the volume of the submerged part of the human body are obtained according to the water depth and standard human body data, and the flow resistance coefficient is obtained according to the water depth and water flow velocity; the stabilizing force arm is obtained according to the standard human body data.

[0088] It should be noted that the human body is at risk of slipping and instability under the impact of water flow. The calculation formula of the above slip risk index is derived according to the following method:

[0089] Gravity expression formula:

[0090] W=ρ P V T g (3)

[0091] Where: W is gravity, unit is N; ρ P is the human body density, in kg / m 3 ; g is the acceleration due to gravity, in m / s 2 ,V T is the total volume of the human body, in m 3 Preferably, the total volume of the human body is in the range of 0.04-0.08m 3 .

[0092] The formula for expressing flow resistance is:

[0093]

[0094] Where: C d is the flow resistance coefficient, unitless; A is the flow area of ​​the submerged part of the human body, unit is m 2 ρ w is the density of water in kg / m 3 ; v is the water flow velocity, in m / s;

[0095] Buoyancy expression formula:

[0096] B=ρ w V P (5)

[0097] Where: B is buoyancy, unit is N; V P is the volume of the submerged part of the human body, in m 3 ;

[0098] Friction force expression:

[0099] f=μN 1 =μ(WB) (6)

[0100] Where: f is the friction force, unit is N; μ is the static friction coefficient, no unit; N 1 is the support force of the road on the human body, in N;

[0101] Then, under the critical state, when the flow resistance F is equal to the friction force f, it can be expressed as F = f = μ (WB), that is:

[0102]

[0103] Since the density of water is very close to that of the human body, we take ρ W =ρ P =ρ, equation (7) can be rewritten as:

[0104]

[0105] Then define the risk index of rainwater discharge road slippage R X1 :

[0106]

[0107] Sliding instability is caused by the flow resistance F being greater than the friction force f between the human body and the ground, that is, R X1 >1 will lead to slip instability, R X1 The larger the size, the higher the risk of slippage and instability.

[0108] It should be noted that the human body is at risk of capsizing and becoming unstable under the impact of water flow. The calculation formula of the above capsizing risk index is derived according to the following method:

[0109] The torque balance expression formula is:

[0110] M D =F·L D =M S =ρg(V T -V P )L S (9)

[0111] Where: M D is the overturning moment, in N·m; M S is the human body stability moment, in N·m; L D is the overturning lever, in m; L S is the stabilizing lever arm, in m. D The value is 1 / 2 of the human body submerged water depth D, and the stabilizing force arm L S According to the standard data of the human body, preferably, the above-mentioned stabilizing force arm L S The value range is 0.04-0.08m.

[0112] Substituting formula (4) into the moment balance expression formula (9) yields:

[0113]

[0114] Also because Then define the overturning instability risk index R of the flood discharge road X2 :

[0115]

[0116] like Figure 2 As shown in the figure, the overturning instability is caused by the overturning force moment M caused by the flow resistance F. D Greater than the human body's stable force distance M S Due to R X2 >1 will cause capsizing instability, R X2 The larger it is, the higher the risk of capsizing and instability.

[0117] It should be noted that if Figure 3 As shown, the embodiment of the present invention obtains standard human body data based on the Chinese adult human body size GB / T 10000-1988, taking an adult male with a height of 175 cm and a weight of 60 kg as the standard, and thereby establishes a human body model through three-dimensional modeling technology to simulate the force of the human body in water. According to the water depth value, the frontal area of ​​the submerged part of the human body and the volume of the submerged part of the human body model are obtained from the human body model through analysis software.

[0118] It should be noted that the flow resistance coefficient changes with the change of water depth and water flow velocity. Therefore, the embodiment of the present invention adopts CFD software to simulate the flow of water around the human body according to the water depth and water flow velocity to obtain the flow resistance coefficient, wherein the value range of the above-mentioned flow resistance coefficient is 0.23~0.316.

[0119] It should be noted that if Figure 4 As shown, the static friction coefficient in the embodiment of the present invention is obtained by an experiment. The test material is placed on the test road surface. The test material is connected to the counterweight barrel through a traction rope around pulleys 1 and 2. The test material is a weight of a certain mass. When the counterweight barrel starts to descend, the gravity F of the counterweight barrel is calculated. 1 , the gravity F of the measured material is known 2 According to the friction calculation formula, the static friction coefficient is The static friction coefficient measured by the experiment is 0.6-0.8. Among them, the static friction coefficient between the test object and the test road surface is the static friction coefficient between the human sports shoes and the road surface under the condition of water immersion.

[0120] In this way, the parameters in the above risk index calculation formula can be obtained according to the water depth value of the stormwater discharge road, the water flow velocity, and the standard data of the human body, and then the risk index of the stormwater discharge road can be determined.

[0121] S134, determining whether the risk index is less than the first risk index threshold, and if so, determining the risk level as the second risk level;

[0122] S136, determining whether the risk index is greater than or equal to the first risk index threshold and less than or equal to the second risk index threshold, if so, determining the risk level as the third risk level;

[0123] S138, determining whether the risk index is greater than the second risk index threshold, and if so, determining it as the fourth risk level.

[0124] In this way, when the water depth value of the stormwater discharge road is greater than the first water depth value, the risk index is determined by the water depth value and the water flow velocity; further, the risk index is compared with the risk index threshold to determine the risk level.

[0125] It should be noted that due to the risk index R X When >1, danger is very likely to occur, so the second risk index threshold can be set to a value less than or equal to 1; the first risk index threshold is lower than the second risk index threshold. The purpose is to issue graded alarms when there is a lower risk to adults, reminding pedestrians of their proximity to the highest risk level, so that pedestrians can have a better judgment on the water conditions on the road for rain and flood discharge.

[0126] In the embodiment of the present invention, the above step S140 includes the following sub-steps:

[0127] S142, determining whether the risk level is greater than or equal to the second risk level;

[0128] S144, if not, then the blue light continues to flash in the first cycle.

[0129] In this way, when the risk level of the rain and flood discharge road is lower than the second risk level, the blue light will continue to flash at the first flashing frequency to remind pedestrians to pay attention to safety.

[0130] It should be noted that when the blue light flashes as an alarm, it means that the water conditions on the flood discharge road pose no risk to healthy adults, but there is a greater risk of wading for children, and children are prohibited from passing.

[0131] In the embodiment of the present invention, the above step S140 includes the following sub-steps:

[0132] S146, determining whether the risk level is greater than or equal to the second risk level;

[0133] S148, if yes, determine whether there are pedestrians in the preset area, and if yes, execute flash alarm and voice alarm according to the risk level. In this way, when the risk level of the flood discharge road is greater than or equal to the second risk level, add voice alarm to comprehensively remind pedestrians to pay attention to safety through sound and light signals.

[0134] In the embodiment of the present invention, the above step S148 includes the following sub-steps:

[0135] S1482, if the risk level is the second risk level, the blue light flashes continuously in the second cycle, and the voice broadcast of the first number is repeated periodically;

[0136] S1484, if the risk level is the third risk level, the orange light flashes continuously for a third period, and the voice broadcast of the second number is repeated periodically;

[0137] S1486, if the risk level is the fourth risk level, the red light flashes continuously for a fourth period, and the voice announcement is repeated for a third number periodically;

[0138] Among them, the first period is greater than the second period, greater than or equal to the third period, greater than or equal to the fourth period, and the first number is less than the second number, which is less than the third number.

[0139] In this way, corresponding flash alarms are executed for different risk levels. As the risk level continues to increase, the light flashing cycle is shortened and the voice broadcast periodicity is increased to better remind pedestrians to pay attention to safety.

[0140] It should be noted that an adult male with a height of 175 cm and a weight of 60 kg is used as the standard human body data. When the orange light flashes for alarm, it means that the water situation on the flood discharge road poses a certain risk to adults. Adults weighing less than 60 kg theoretically do not have the ability to pass through this section safely, and adults weighing more than 60 kg should pass with caution; when the red light flashes for alarm, it means that the water situation on the flood discharge road poses a great risk to everyone, and no one is allowed to pass.

[0141] For example, according to the standard human body data of a 60kg adult, if the real-time measured water depth D is 0.6m and the water flow velocity v is 2.1m / s, the corresponding headwater area A of the submerged part of the human body obtained from the human body model is 0.105m 2 , the volume of the submerged part of the human body is V p 0.0132m 3 ; Total volume of human body V T 0.06m 3 ; Gravitational acceleration g is 9.81m / s 2 ; Flow resistance coefficient C d The value of Ls is 0.043m. Substituting the above parameters into the slip risk index calculation formula (1), we can get R X1 =0.27; Substitute it into the capsizing risk index calculation formula (2) and calculate R X2 =1.12, the larger value is recorded as the risk index R X =1.12>1, the risk of capsizing and instability is high.

[0142] For example, if the first water depth value D1 is set to 0.6 m, the second water depth value D2 is set to 0.3 m, the first risk index threshold R 1 is 1, the second risk index threshold R 2is 0.8; when rainfall occurs and the runoff water depth reaches the second water depth value of 0.3m, the runoff wake-up device activates the water depth sensor. When the water depth value is greater than the second water depth value of 0.3m and less than the first water depth value of 0.6m, the water accumulation at this depth poses a risk to children traveling, but is basically risk-free for adults, so only a blue flash alarm is issued at this time to remind children and parents with children. When the water depth value reaches the first water depth value of 0.6m, the flow rate monitoring device is activated. At this time, the water depth combined with the flow rate of the rain and flood discharge road may pose a risk to adults, so the flow rate sensor device is activated at this time, and the risk index calculation and risk level judgment are started at the same time. Through the above-mentioned risk index calculation formula (1) and calculation formula (2), the required calculation parameters are obtained according to the water flow velocity and water depth value, and the processor performs calculations, and the larger value obtained by the two formulas is taken as the real-time risk index Rx of the road at this time, and then Rx is compared with the preset first risk index threshold R 1 and the second risk index threshold R 2 For comparison, when R X <0.8, continue blue alarm and increase voice alarm, when 0.8<R X When the alarm is less than 1, an orange alarm and voice alarm will be given. X When >1, red alarm and voice alarm will be issued.

[0143] The embodiment of the present invention provides a rain and flood discharge road risk warning device, which is used to implement the above-mentioned warning method, such as Figure 5 As shown, the above device comprises:

[0144] The main frame 200, and the host 210, water depth monitoring device 220, flow rate monitoring device 230 and alarm 240 arranged on the main frame 200; the water depth monitoring device 220 is used to monitor the water depth value; the flow rate monitoring device 230 is used to monitor the water flow velocity; the alarm 240 is used for risk alarm; the host 210 is electrically connected to the water depth monitoring device 220, the flow rate monitoring device 230 and the alarm 240, and is used to obtain the water depth value and the water flow velocity, and determine the risk level according to the water depth value and the water flow velocity, and make a risk alarm.

[0145] In an embodiment of the present invention, the host also includes: an electrically connected circuit board 212, a battery 214 and a communication antenna 216; the water depth monitoring device 220 includes: a radar water depth sensor 222 or a pressure liquid level monitoring device 224; the flow rate monitoring device 230 includes: a radar speed sensor 232 or a slurry flow meter 234; the alarm 240 includes at least one of a flash alarm 242 and a sound alarm 244; the main body bracket is also provided with a solar panel 250, a pedestrian monitoring radar 260 and a runoff wake-up device 270; the solar panel 250 is electrically connected to the battery 214; the pedestrian monitoring radar 260 is electrically connected to the host 210, and is used to monitor whether there are pedestrians in the preset area; the runoff wake-up device 270 is electrically connected to the host 210, and is used to activate the water depth monitoring device.

[0146] The following further describes the device structure or use method of the embodiment of the present invention in conjunction with the accompanying drawings:

[0147] Figure 6 The modular schematic diagram of the risk warning device for rain and flood discharge roads is shown in FIG. Specifically, the risk warning device for rain and flood discharge roads includes: a water depth sensor 1, a flow rate sensor 2, a host 3, a flash alarm 4, a sound alarm 5, a power supply component 6, a runoff wake-up device 7, a communication module 8, and a pedestrian monitoring radar 9. The modular system monitors the flow rate of water flow through the water depth sensor 1; monitors the water depth value through the flow rate sensor 2, obtains the parameters in the risk index calculation formula based on the above monitoring data, and calculates according to the above risk index calculation formula (1) and formula (2), and takes the larger value as the real-time risk index R X , and then according to the real-time risk index R X By comparing with the preset risk index threshold, the pedestrian wading risk level on the flood discharge road is determined and an early warning is issued.

[0148] It should be noted that the water depth sensor includes a radar water depth sensor or a pressure and liquid level monitoring device, and the flow rate sensor includes a radar velocity sensor or a slurry flow meter. Therefore, as long as the monitoring functions of the water depth monitoring device and the flow rate monitoring device can be realized, the above-mentioned radar water depth sensor, pressure and liquid level monitoring device, radar velocity sensor and slurry flow meter can be replaced by other components that can realize the above-mentioned functions.

[0149] Figure 7 This is a schematic diagram of the structure of the runoff awakening device in an embodiment of the present invention. Specifically, a hole is opened below the main support, and a float is built in to trigger the water depth sensor. When surface runoff is generated, the float rises due to buoyancy. When the float rises to the second water depth value D2, a signal is sent to activate the water depth sensor to start working.

[0150] Figure 8The present invention is a schematic structural diagram of a radar version of a rain and flood road early warning instrument of a rain and flood road risk early warning system. Specifically, the radar version of the rain and flood road early warning instrument includes a runoff wake-up device 11, which is used to start a water depth monitoring device; a flash alarm 12, which is used to issue a corresponding flash alarm after determining that the road is risky; a host 13, which is used to calculate a real-time risk index by collecting water flow velocity and water depth value data and compare it with the risk index threshold, and then determine the road wading risk; a sound alarm 14, which is used to prompt pedestrians of risk through a voice alarm when detecting someone passing by; a pedestrian monitoring radar 15, which is used to monitor whether there are pedestrians passing by, so as to determine whether to issue a sound alarm; a main frame 16, which is used to support other components of the radar version of the rain and flood road early warning instrument; and a solar panel 17, which is used to power the battery.

[0151] Fig. 9 The main structure diagram of the device is shown in Figure 1. Specifically, the main unit includes a runoff awakening device 11 for starting a water depth monitoring device; a flash alarm 12 for issuing a corresponding flash alarm after determining that the road is risky; a main unit 13 for calculating a real-time risk index for the collected water flow velocity and water depth value data and comparing it with the risk index threshold, and then determining the road wading risk; a sound alarm 14 for alerting pedestrians of risk through a voice alarm when detecting someone passing by; a pedestrian monitoring radar 15 for monitoring whether pedestrians are passing by, so as to determine whether to issue a sound alarm; a main frame 16 for supporting the main unit; and a solar panel 17 for powering the battery.

[0152] Fig.10 This is a schematic diagram of the structure of a portable rain and flood discharge road warning instrument of the rain and flood discharge road risk warning system. Specifically, the portable rain and flood discharge road warning instrument can be used by the rain and flood management department to temporarily monitor the road sections where risks may occur. The advantages of this warning instrument are that it is easy to arrange, fast and low in cost. The warning instrument is supported by a tripod as a whole, which is easy to deploy and install. The early warning instrument includes a flash alarm 21, which is used to make a corresponding flash alarm after judging that there is a risk on the road; a pedestrian monitoring radar 22, which is used to monitor whether there are pedestrians passing by, so as to judge whether to make a sound alarm; a communication antenna 23, which uploads the monitored water flow velocity and water depth value data and risk information, and can change the working mode according to the instructions issued by the flood warning platform; a main circuit board 24, which is used to obtain the parameters required to calculate the risk index from the collected water flow velocity and water depth value data, and then calculate the real-time risk index and compare it with the risk index threshold, and then judge the road wading risk; a battery 25, which is used to power the equipment; a sound alarm 26, which is used to remind pedestrians of the risk through a voice alarm when the pedestrian monitoring radar detects that someone is passing by; a slurry flow meter 27, which is used to measure the water flow velocity. A pressure-type liquid level monitoring device 28 is used to monitor the water depth value.

[0153] Of course, those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the control device through a computer, and the program can be stored in a computer-readable storage medium. When the program is executed, it may include the processes of the above-mentioned method embodiments, wherein the storage medium may be a memory, a disk, an optical disk, etc.

[0154] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0155] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the rain and flood discharge road risk warning device disclosed in the embodiment, since it corresponds to the rain and flood discharge road risk warning method disclosed in the above embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0156] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A rain and flood discharge road risk warning method, characterized in that: Applied to a risk warning device, the method comprises the following steps: Get the water depth value; Determine whether the water depth value is greater than or equal to the second water depth value and less than or equal to the first water depth value, and if so, control the risk warning device to be in a working state and execute the first frequency monitoring mode; Determine whether the water depth value is greater than the first water depth value, and if so, control the risk warning device to be in a working state and execute the second frequency monitoring mode; Determine whether the water depth value is less than the second water depth value, and if so, control the risk warning device to be in a closed state; wherein the first frequency is less than the second frequency; Determine whether the water depth value is greater than the second water depth value and less than or equal to the first water depth value, and if so, determine it as a first risk level; Determine whether the water depth value is greater than the first water depth value, and if so, obtain the water flow velocity; Determining a risk level according to the water depth value and the water flow velocity; Determining the risk level according to the water depth value and the water flow velocity comprises the following steps: Determining a risk index according to the water depth value and the water flow velocity; Determine whether the risk index is less than a first risk index threshold, and if so, determine it as a second risk level; Determine whether the risk index is greater than or equal to the first risk index threshold and less than or equal to the second risk index threshold, and if so, determine it as the third risk level; Determine whether the risk index is greater than the second risk index threshold, and if so, determine it as a fourth risk level; Determining the risk index according to the water depth value and the water flow velocity comprises the following steps: Determine the risk index according to the water depth value and the water flow velocity by using a risk index calculation formula; The risk index calculation formula is: and / or, Among them, R X1 is the slip risk index, R X2 is the capsizing risk index, and the larger value among the risk indexes is taken as the basis for risk judgment, which is recorded as the risk index R X , C d is the flow resistance coefficient, v is the water velocity, A is the area of ​​the submerged part of the human body facing the water flow, g is the gravitational acceleration, μ is the static friction coefficient, V T is the total volume of the human body, V P is the volume of the submerged part of the human body, D is the water depth value, and Ls is the stabilizing force arm; the frontal area of ​​the submerged part of the human body and the volume of the submerged part of the human body are obtained according to the water depth value and the standard human body data, and the flow resistance coefficient is obtained according to the water depth value and the water flow velocity; the stabilizing force arm is obtained according to the standard human body data; According to the risk level, a graded risk alarm is issued.

2. The rainwater flood discharge road risk warning method according to claim 1 is characterized in that: The step of performing a graded risk alarm according to the risk level comprises the following steps: Determining whether the risk level is greater than or equal to the second risk level; If not, the blue light continues to flash at the first flashing frequency.

3. The rainwater flood discharge road risk warning method according to claim 2 is characterized in that: According to the risk level, a graded risk alarm is performed, including the following steps: Determining whether the risk level is greater than or equal to the second risk level; If yes, it determines whether there are pedestrians in the preset area. If yes, it executes flash alarm and voice alarm according to the risk level.

4. The rainwater flood discharge road risk warning method according to claim 3 is characterized in that: The method of executing flash alarm and voice alarm according to the risk level includes the following steps: If the risk level is the second risk level, the blue light flashes continuously at the second flashing frequency, and the voice broadcast of the first number is repeated periodically; If the risk level is the third risk level, the orange light flashes continuously at the third flash frequency, and the voice broadcast of the second number is repeated periodically; If the risk level is the fourth risk level, the red light flashes continuously at the fourth flashing frequency, and the voice announcement is repeated periodically for the third number; Among them, the first flash frequency is less than or equal to the second flash frequency, less than or equal to the third flash frequency, less than or equal to the fourth flash frequency, and the first number is less than the second number, less than the third number.

5. A rain and flood discharge road risk warning device, characterized in that: Used to implement the early warning method according to any one of claims 1 to 4, the device comprises: A main frame, and a main engine, a water depth monitoring device, a flow rate monitoring device and an alarm arranged on the main frame; The water depth monitoring device is used to monitor the water depth value; The flow rate monitoring device is used to monitor the flow rate of water; The alarm is used for risk alarm; The host is electrically connected to the water depth monitoring device, flow rate monitoring device and alarm, and is used to obtain the water depth value and water flow rate, and determine the risk level according to the water depth value and water flow rate, and issue a risk alarm.

6. The rainwater flood discharge road risk warning device according to claim 5 is characterized in that: The host also includes: an electrically connected circuit board, a battery and a communication antenna; And / or, the water depth monitoring device includes: a radar water depth sensor or a pressure level monitoring device; And / or, the flow rate monitoring device includes: a radar velocity sensor or a slurry flow meter; And / or, the alarm includes at least one of a flash alarm and a sound alarm; And / or, the main support is also provided with a solar panel, a pedestrian monitoring radar and a runoff awakening device; the solar panel is electrically connected to the battery; the pedestrian monitoring radar is electrically connected to the host to monitor whether there are pedestrians in a preset area; the runoff awakening device is electrically connected to the host to activate the water depth monitoring device.

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