Fire water supply hoses with monitoring and alarm functions and their monitoring and alarm methods

Abstract

This invention provides a fire-fighting water supply hose with monitoring and alarm functions, including a first connector (1) and a second connector (2) for connecting a fire hose nozzle, a hose body (3), a pressure sensor group (4) disposed on the inner wall of the hose body (3), a controller (5) disposed on the surface of the first connector (1) for data acquisition and analysis, and an alarm (6). The pressure sensor group (4) and the alarm (6) are both electrically connected to the controller (5). This invention also provides a monitoring and alarm method for the fire-fighting water supply hose. During the water supply process, the pressure value measured by the pressure sensor group (4) is collected at fixed intervals, and the data is analyzed to determine the value change of the fault index. If the fault index is greater than its threshold at a certain moment, the electronic switch (514) is closed to trigger the alarm (6). The fire-fighting water supply hose of this invention has a simple structure, is easy to maintain, has low cost, does not damage the hose body, and has a long service life. It can be modified based on the existing product structure. The corresponding monitoring and alarm method has simple logic, is stable and reliable, and is easy to program.

Description

Technical Field

[0001] This invention relates to the field of fire protection, and in particular to a fire water supply hose with monitoring and alarm functions and a monitoring and alarm method thereof. Background Technology

[0002] Fires severely endanger people's lives and property, making the rapid and efficient extinguishing of fires a critical issue. For large-scale fires, water spraying is the primary method of firefighting. Since fire hydrants, fire pumps, and other water intake facilities are often some distance from the fire site, a flexible hose is typically used, connecting one end to the water intake facility and the other end to a fire hose nozzle. This allows water to be transported from the intake facility to the fire site and sprayed out by the fire hose.

[0003] Because fire hoses are quite long, they are usually flattened and wound around a reel to save storage space. In case of fire, the hose is quickly unwound and connected to the water intake facilities and fire hoses. To achieve the best possible firefighting effect and ensure sufficient flow and pressure supply to the fire hoses, the hoses must be laid out smoothly, without bends, tangles, or leaks. Otherwise, bends and tangles will create significant local resistance, resulting in a huge waste of water supply energy, insufficient pressure at the fire hoses, and reduced flow. Leaks will directly lead to further losses in flow and pressure.

[0004] However, due to the urgency of firefighting operations and the complex and ever-changing on-site environment, coupled with the often considerable length of hoses, operators often lack sufficient time to inspect them during deployment. This can lead to bends, tangles, or even damage to the hose itself. Furthermore, accidents such as people stepping on or kicking the hose, or objects rolling over it, can cause localized bends and tangles. Therefore, there is an urgent need to develop corresponding technical means to monitor the smoothness of water supply through the hoses. This would allow for timely alarms to be issued when localized bends, tangles, or leaks are detected, alerting operators to address the problem and overcome the current reliance on manual hose inspection. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a fire-fighting water supply hose with monitoring and alarm functions that is simple in structure, easy to maintain, low in cost, does not damage the hose body, has a long service life, and can be modified based on existing product structures. It also provides a monitoring and alarm method that is simple in logic, stable and reliable, and easy to program.

[0006] According to one aspect of the present invention, a fire-fighting water supply hose with monitoring and alarm functions is provided, the technical solution of which is:

[0007] A fire-fighting water supply hose with monitoring and alarm functions can monitor the water supply process of the hose and provide alarms when the hose bends or leaks. It includes a first connector, a second connector, a hose body, a pressure sensor group, a controller, and an alarm. The first connector and the second connector are located at both ends of the hose body and are mechanically connected to the ports at both ends of the hose body. Multiple pressure sensors are evenly spaced on the inner wall of the hose body to form a pressure sensor group. The controller is located on the surface of the first connector. The controller consists of a controller body and a push-button switch for the controller to be on. The alarm and the pressure sensor group are electrically connected to the controller body via cables.

[0008] The fire water supply hose with monitoring and alarm functions has between 5 and 100 pressure sensors constituting the pressure sensor group, and all pressure sensors are fixed to the inner wall of the hose body by adhesive bonding.

[0009] The aforementioned fire-fighting water supply hose with monitoring and alarm functions is used to connect the pressure sensor group. The cable passes through the first connector and is then electrically connected to the controller body.

[0010] The aforementioned fire-fighting water supply hose with monitoring and alarm functions includes a controller body comprising a data acquisition module, a control module, a battery, and an electronic switch, wherein:

[0011] The battery is electrically connected to the push-button switch and its power supply and power-off states are controlled by the push-button switch. The battery is electrically connected to the data acquisition module and the control module, and the battery is also electrically connected to the electronic switch and the alarm in sequence.

[0012] The acquisition module is electrically connected to the pressure sensor group and the control module, and is used to acquire pressure data from the pressure sensor group in real time and transmit it to the control module.

[0013] The control module receives the data collected by the acquisition module for analysis and calculation, and controls the closing and opening states of the electronic switch based on the analysis results.

[0014] The aforementioned fire-fighting water supply hose with monitoring and alarm functions can be alarmed by any one of three methods: emitting sound, emitting light, or emitting both sound and light simultaneously.

[0015] The aforementioned fire water supply hose with monitoring and alarm functions has a first connector for connecting to a fire hose to spray water to the fire site, and a second connector for connecting to a water intake to obtain fire water.

[0016] According to another aspect of the present invention, a monitoring and alarm method is provided for the above-mentioned fire water supply hose with monitoring and alarm function, the technical solution of which is:

[0017] The pressure sensors are numbered sequentially from the first connector to the second connector, from 1 to N, where N is the number of pressure sensors. When the fire water supply hose is used for water supply, the push-button switch is closed to put the battery into power supply mode, the fault index F is set to its initial value of 0, and the electronic switch is in the default off state. At fixed intervals during the water supply process, the pressure values ​​measured by the pressure sensor group are collected and analyzed. The change in the fault index F is determined based on the analysis results. If the fault index F is greater than its preset threshold Fc at a certain moment during the water supply process, the electronic switch is closed, causing the alarm to activate. If the fault index F is less than or equal to its preset threshold Fc at a certain moment during the water supply process, the electronic switch is opened, causing the alarm to deactivate. The change in the fault index F during each data analysis process is determined by the following steps:

[0018] Step S1: Organize the measurement results of all pressure sensors in the pressure sensor group into a data sequence D = [d1, d2, ..., d...]. i , ...d N ], where d i The measurement result represents the pressure sensor numbered i;

[0019] Step S2: The data sequence A = [d2-d1, d3-d2, ..., d...] is obtained by calculating the data sequence D. N -d (N-1) ];

[0020] Step S3: Calculate the mean μ and standard deviation σ of all elements in data sequence A, thereby obtaining the comparison benchmark value E = μ + Kσ, where K is greater than 2;

[0021] Step S4: Compare all elements in data sequence D with the benchmark value E in turn. If there is an element in data sequence A that is greater than the benchmark value E, increase the fault index F by 1. If all elements in data sequence A are less than or equal to the benchmark value E, set the fault index F to the larger of the following two values:

[0022] (i) The value of the failure index F obtained by reducing m from the original value, where m is between 0.1 and 0.5;

[0023] (ii) The value is 0.

[0024] In the above-mentioned monitoring and alarm method for fire water supply hoses with monitoring and alarm functions, the threshold Fc of the fault index F is greater than or equal to 2.

[0025] The monitoring and alarm method for the fire water supply hose with monitoring and alarm functions mentioned above, wherein the fixed time interval for pressure value acquisition and data analysis during the water supply process is between 1 second and 30 seconds.

[0026] This invention applies the principles of Bernoulli's equation and continuity equation from fluid mechanics. The total pressure head of the fluid in the pipe consists of three parts: potential pressure head, dynamic pressure head, and static pressure head, and these three can be converted into each other. The magnitude of the static pressure head can be measured and calculated by a pressure sensor installed on the inner wall of the pipe. The mass of the fluid is conserved during the flow process in the pipe, while its total pressure head gradually decreases due to flow resistance. During the water supply process via the flexible hose, the water at the intake point located at the second connector has the highest total pressure head. As the water is transported along the hose to the nozzle located at the first connector, its total pressure head continuously decreases.

[0027] A series of pressure sensors are arranged at equal intervals on the water conveying hose. The difference between two adjacent pressure sensors represents the change in local static head. Under normal circumstances, if the hose is free from bends, tangles, damage, or leakage, the energy loss during water conveyance mainly comes from friction loss. This causes the total water head to gradually decrease at a roughly constant rate as the conveying distance increases. Since the flow velocity is uniform throughout the hose under normal conditions, the dynamic head remains essentially constant. While the potential head may change due to variations in elevation throughout the hose, the magnitude of the change is not particularly large. For example, if a 1-meter section of the hose is taken, the maximum difference in potential head between the two ends of the section is 1 meter of water head, and this limit is achieved when the section is vertical. Therefore, under normal circumstances, the local static head throughout the hose does not change significantly.

[0028] When a hose experiences a bend or entanglement at a point, a significant local resistance loss occurs at that location, causing a rapid drop in the total water head. This drop in total head is primarily manifested as a sudden decrease in the static pressure head at that point. Consequently, the static pressure difference measured between the two pressure sensors closest to the fault location will be significantly greater than the static pressure difference measured between adjacent pressure sensors at other locations. Similarly, when a hose leaks, the area connected to the outside atmosphere loses pressure, again resulting in a significantly greater static pressure difference measured between the two pressure sensors closest to the leak location than the static pressure difference measured between adjacent pressure sensors at other locations.

[0029] Based on the above principle, a series of pressure sensors are arranged at equal intervals on the water delivery hose. The measurement difference between adjacent pressure sensors is measured and calculated sequentially along the same direction. This series of measurement differences represents the change in local static pressure head. If the hose is in normal condition, the difference in the change in local static pressure head will not be significant. However, if there is a bend, entanglement, or leakage in a certain part of the hose, the change in static pressure head at that location will be significantly greater than the values ​​at other locations. Considering that hoses of various specifications have the same length and that the flow rate and pressure during water delivery are variable, a statistical method can be used to determine whether the change in static pressure head at any location is significantly greater than at other locations: the average and standard deviation of the changes in all static pressure head at a certain moment are calculated, and the average is increased by several times the standard deviation as a comparison benchmark. If the change in static pressure head at a certain location is greater than this comparison benchmark, it is considered significantly excessive, and the fault index F is increased by 1. Meanwhile, to avoid random accidents, only when the static pressure head changes significantly more frequently in a short period of time will the fault index F accumulate and exceed the threshold. If it is just an occasional fault, the increase in the fault index F will be small, and as time goes by, the fault index F will gradually decrease and return to its initial value of 0. If the operator eliminates the fault in time after receiving the alarm during the water transfer process, the fault index F will also gradually decrease and the alarm status will be lifted.

[0030] Based on the above principles, the following beneficial effects of the present invention can be easily observed:

[0031] 1. This invention relates to a fire-fighting water supply hose with monitoring and alarm functions. Based on the existing known hose structure, it only adds a pressure sensor group, a controller, an alarm, and cables for electrical connection. The overall structure is simple, low-cost, and easily modified from existing hose products. The pressure sensor is glued to the inner wall of the hose body. The cable connecting the pressure sensor group and the controller passes through the first connector rather than the hose body itself. Therefore, the added pressure sensor group and cable do not cause any damage to the hose body, eliminating the need for openings and thus preserving its service life. The controller and alarm are located on the first connector for connecting to the fire hose nozzle, facilitating on-site observation by operators. The controller includes a push-button switch, which is only closed by the operator when the hose is in use, saving battery power and extending the sensor's lifespan. If maintenance or component replacement is required, the hose assembly can be easily disassembled, the sensor group and cables removed from the hose body, and the relevant components inspected and replaced, making maintenance convenient.

[0032] 2. The monitoring and alarm method for fire-fighting water supply hoses of this invention utilizes principles of fluid mechanics and statistics. It obtains the change in static pressure head at various points by analyzing a series of measurement differences between two adjacent pressure sensors. If the change in static pressure head at a certain point shows a significant and concentrated increase within a short period, it is determined that there is excessive local resistance or leakage at that point, and an alarm is triggered. Further, referring to the description of the principles of this invention, it is clear that the related alarm judgment method has simple logic, is easy to program, can eliminate random and occasional factors to avoid false alarms, and can dynamically determine whether to trigger or deactivate the alarm based on the actual situation on site. Therefore, it has the characteristics of stability and reliability. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of a fire-fighting water supply hose with monitoring and alarm functions in an embodiment of the present invention. In the figure, 1 is the first connector, 2 is the second connector, 3 is the hose body, 4 is the pressure sensor group, 5 is the controller, 6 is the alarm, 51 is the controller body, 52 is the push-button switch, 401 is pressure sensor No. 1, 402 is pressure sensor No. 2, 403 is pressure sensor No. 3, 404 is pressure sensor No. 4, 405 is pressure sensor No. 5, 406 is pressure sensor No. 6, 407 is pressure sensor No. 7, 408 is pressure sensor No. 8, 409 is pressure sensor No. 9, and 410 is pressure sensor No. 10.

[0034] Figure 2 for Figure 1 The diagram shows the configuration of the controller. In the diagram, 6 is the alarm, 51 is the controller body, 52 is the push-button switch, 511 is the data acquisition module, 512 is the control module, 513 is the battery, and 514 is the electronic switch.

[0035] Figure 3 This is a flowchart of a monitoring and alarm method for a fire-fighting water supply hose with monitoring and alarm functions, as described in an embodiment of the present invention. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] like Figure 1As shown, a fire-fighting water supply hose with monitoring and alarm functions can monitor the water supply process of the hose and provide alarms when the hose bends or leaks. It includes a first connector 1, a second connector 2, a hose body 3, a pressure sensor group 4, a controller 5, and an alarm 6. The first connector 1 and the second connector 2 are located at both ends of the hose body 3 and are mechanically connected to the ports at both ends of the hose body 3. Multiple pressure sensors are equally spaced on the inner wall of the hose body 3 to form the pressure sensor group 4. The controller 5 is provided on the surface of the first connector 1. The controller 5 consists of a controller body 51 and a push-button switch 52 for the controller 5 to be in the open state. The alarm 6 and the pressure sensor group 4 are both electrically connected to the controller body 51 through cables.

[0038] The fire water supply hose with monitoring and alarm functions has 5 to 100 pressure sensors constituting the pressure sensor group 4, and all pressure sensors are fixed to the inner wall of the hose body 3 by adhesive bonding.

[0039] The aforementioned fire water supply hose with monitoring and alarm functions is used to connect the cable of the pressure sensor group 4 through the first connector 1 and then electrically connect it to the controller body 51.

[0040] like Figure 2 As shown, the aforementioned fire water supply hose with monitoring and alarm functions includes a controller body 51 comprising a data acquisition module 511, a control module 512, a battery 513, and an electronic switch 514, wherein:

[0041] The battery 513 is electrically connected to the push button switch 52 and its power supply and power-off states are controlled by the push button switch 52. The battery 513 is electrically connected to the acquisition module 511 and the control module 512, and the battery 513 is electrically connected to the electronic switch 514 and the alarm 6 in sequence.

[0042] The acquisition module 511 is electrically connected to the pressure sensor group 4 and the control module 512, and is used to acquire pressure acquisition data of the pressure sensor group 4 in real time and transmit it to the control module 512.

[0043] The control module 512 receives the data collected by the acquisition module 511 for analysis and calculation, and controls the closing and opening states of the electronic switch 514 according to the analysis results.

[0044] The aforementioned fire water supply hose with monitoring and alarm functions, wherein the alarm device 6 achieves alarm by emitting sound, emitting light, or emitting both sound and light simultaneously.

[0045] The aforementioned fire water supply hose with monitoring and alarm functions has a first connector 1 for connecting to a fire hose to spray water to the fire site, and a second connector 2 for connecting to a water intake to obtain fire water.

[0046] like Figure 3 As shown, a monitoring and alarm method is applied to the aforementioned fire water supply hose with monitoring and alarm functions:

[0047] Pressure sensors are numbered sequentially from 1 to N, from the first connector 1 to the second connector 2, where N is the number of pressure sensors. When the fire water supply hose is used for water supply, the push-button switch 52 is closed to put the battery 513 into power supply mode, the fault index F is set to its initial value of 0, and the electronic switch 514 is in the default off state. At fixed intervals during the water supply process, the pressure values ​​measured by the pressure sensor group 4 are collected and analyzed. The change in the fault index F is determined based on the analysis results. If the fault index F is greater than its preset threshold Fc at a certain moment during the water supply process, the electronic switch 514 is closed, causing the alarm 6 to activate and sound an alarm. If the fault index F is less than or equal to its preset threshold Fc at a certain moment during the water supply process, the electronic switch 514 is opened, causing the alarm 6 to deactivate. The change in the fault index F during each data analysis process is determined by the following steps:

[0048] Step S1: Organize the measurement results of all pressure sensors in pressure sensor group 4 into a data sequence D = [d1, d2, ..., d...]. i , ...d N ], where d i The measurement result represents the pressure sensor numbered i;

[0049] Step S2: The data sequence A = [d2-d1, d3-d2, ..., d...] is obtained by calculating the data sequence D. N -d (N-1) ];

[0050] Step S3: Calculate the mean μ and standard deviation σ of all elements in data sequence A, thereby obtaining the comparison benchmark value E = μ + Kσ, where K is greater than 2;

[0051] Step S4: Compare all elements in data sequence D with the benchmark value E in turn. If there is an element in data sequence A that is greater than the benchmark value E, increase the fault index F by 1. If all elements in data sequence A are less than or equal to the benchmark value E, set the fault index F to the larger of the following two values:

[0052] (i) The value of the failure index F obtained by reducing m from its original value, where m is between 0.1 and 0.5;

[0053] (ii) The value is 0.

[0054] In the above-mentioned monitoring and alarm method for fire water supply hoses with monitoring and alarm functions, the threshold Fc of the fault index F is greater than or equal to 2.

[0055] The monitoring and alarm method for the fire water supply hose with monitoring and alarm functions mentioned above, wherein the fixed time interval for pressure value acquisition and data analysis during the water supply process is between 1 second and 30 seconds.

[0056] Preferably, a hole is drilled inside the first connector 1, through which the cable used to connect the pressure sensor group 4 passes and is electrically connected to the controller body 51, and the hole is filled with sealant to prevent water leakage.

[0057] Preferably, the controller 5 is fixed to the surface of the first connector 1 by adhesive bonding, and the alarm 6 is fixed to the surface of the controller 5 by adhesive bonding.

[0058] Example

[0059] Please refer to Figure 1 A water supply hose is 22m long. Ten sensors are evenly spaced on the inner surface of the hose body 3. These ten sensors are numbered 1 to 10 according to the direction from the first connector 1 to the second connector 2. The distance between each sensor is 2m. The distance between sensor 1 (401) and the first connector 1, and the distance between sensor 10 (410) and the second connector 2, are also 2m. In this embodiment, the control module 512 is a microcontroller, the alarm 6 is an audible and visual alarm, the reference value E = μ + Kσ has K as 2.5, the fault index F threshold Fc is 3, the fixed time interval for pressure value acquisition and data analysis during the water supply process is 10 seconds, and the data analysis process parameter m is 0.4.

[0060] A fire drill was conducted one day. The second connector 2 was connected to the fire hydrant intake, the hose was extended, and the first connector 1, which was connected to the fire hose, was moved to the fire location. The valve at the fire hydrant intake was fully opened, and the push-button switch 52 was closed to put the battery (513) into a powered state. The fault index F was set to its initial value of 0, and the electronic switch 514 was set to the default open state. The instant after the push-button switch 52 was closed was recorded as t=0s. Thereafter, pressure values ​​were collected and data analyzed every 10s.

[0061] To simulate a fault, a heavy object was tilted and pressed onto a part of the hose at t=30s. Data was collected and analyzed seven times between t=0s and t=60s, with each data collection point at t=0s, t=10s, t=20s, ..., t=60s. The measured values ​​of each pressure sensor during these time periods are shown in Table 1. Each row in Table 1 represents the measured values ​​of a specific sensor within that time period, and each column represents the measured values ​​of each pressure sensor at a specific moment. All pressure values ​​in Table 1 are converted to head form, where 1 m of head corresponds to approximately 9.8 kPa.

[0062] Table 1. Measurement values ​​(m water head) of each pressure sensor at different times.

[0063] t=0s t = 10s t = 20s t = 30s t = 40s t = 50s t = 60s No. 1 45.58 45.59 45.63 44.66 44.65 44.66 44.64 No. 2 46.12 46.16 46.13 45.11 45.12 45.06 45.17 No. 3 46.61 46.61 46.58 45.67 45.64 45.62 45.64 No. 4 47.18 47.18 47.15 46.07 46.10 46.11 46.13 No. 5 47.67 47.59 47.62 46.58 46.64 46.64 46.57 No. 6 48.08 48.08 48.17 47.14 47.17 47.19 47.08 No. 7 48.60 48.67 48.56 48.57 48.53 48.53 48.60 No. 8 49.13 49.14 49.17 49.15 49.09 49.13 49.16 No. 9 49.58 49.68 49.59 49.64 49.66 49.60 49.63 No. 10 50.17 50.08 50.11 50.14 50.13 50.14 50.18

[0064] The measured values ​​corresponding to any column in Table 1 constitute the data sequence D at that time, and the data sequence A can be easily calculated based on the data sequence D.

[0065] Taking t=0s as an example, the data sequence at this time is D=[45.58, 46.12, 46.61, 47.18, 47.67, 48.08, 48.60, 49.13, 49.58, 50.17]. Based on data sequence D, the data sequence A is calculated as [0.54, 0.49, 0.57, 0.49, 0.41, 0.52, 0.53, 0.45, 0.59]. Rounding to two decimal places, the average value μ of all elements in data sequence A is 0.51 m water column, and the standard deviation σ is 0.05 m water column. Therefore, the baseline value E = μ + Kσ = ​​0.51 + 2.5 * 0.05 = 0.64 m water column. Since all element values ​​in data sequence A at t=0s are less than the baseline value E, the fault index F is taken as the larger of the following two values:

[0066] (i) The fault index F is obtained by reducing m = 0.4 from the original value. Since this is the first data analysis, the original value of the fault index F is the initial value of 0 when the controller 5 is powered on. Therefore, the fault index F is -0.4.

[0067] (ii) The value is 0.

[0068] By comparison, it is easy to see that the fault index F = 0 after analyzing the data at time t = 0s.

[0069] The mean μ and standard deviation σ of all elements in the data sequence A at each time point were statistically obtained, and the values ​​of the benchmark value E were calculated as shown in Table 2.

[0070] Table 2. Mean, Standard Deviation, and Benchmark Values ​​at Each Time Point

[0071] t=0s t = 10s t = 20s t = 30s t = 40s t = 50s t = 60s average value 0.51 0.50 0.50 0.61 0.61 0.61 0.62 Standard deviation 0.05 0.07 0.07 0.30 0.27 0.26 0.32 benchmark value 0.64 0.67 0.67 1.35 1.28 1.27 1.42

[0072] By combining Table 1 and Table 2, we can determine the value of the fault index F at each time point, as shown in Table 3.

[0073] Table 3 shows the values ​​of the fault index F at different times.

[0074] t=0s t = 10s t = 20s t = 30s t = 40s t = 50s t = 60s Value 0 0 0 1 2 3 4

[0075] For the three times t=0s, t=10s, and t=20s, all element values ​​in the data sequence A at each time point are less than the baseline value E at that time point. Since the baseline value E is a parameter greater than or equal to 0, the fault index F at these three times points is 0. For the four times t=30s, t=40s, t=50s, and t=60s, there are element values ​​in the data sequence A at each time point that are greater than the baseline value E. Therefore, the fault index F is increased by 1. Thus, the fault index F at these four times points takes the values ​​of 1, 2, 3, and 4, respectively.

[0076] Taking t=30s as an example, Table 1 shows that the data sequence D at this time is [44.66, 45.11, 45.67, 46.07, 46.58, 47.14, 48.57, 49.15, 49.64, 50.14]. Based on the data sequence D, the data sequence A is calculated as [0.45, 0.56, 0.4, 0.51, 0.56, 1.43, 0.58, 0.49, 0.50]. Table 2 shows that the baseline value E at this time is 1.35m water column. The 6th element of data sequence A, 1.43, is greater than the baseline value E. Therefore, the fault index F is increased by 1 based on the value at t=20s, and the final fault index F at this time is 1.

[0077] According to Table 3, the fault index F does not exceed its threshold 3 during the period from t=0s to t=50s. Therefore, the electronic switch 514 remains in the default open state during this period. At t=60s, the fault index F rises to 4, so its value is greater than the threshold 3. At this moment, the electronic switch 514 is closed, thereby making the alarm 6 work to provide an audible and visual alarm.

[0078] Upon receiving the audible and visual alarm, the operator immediately took action, removing the heavy object pressing on the hose. From t=70s, the hose resumed normal water supply, and the fault index F continuously decreased. The fault index F at t=70s, t=80s, and t=90s were 3.6, 3.2, and 2.8 respectively. Therefore, alarm 6 activated and remained in an alarm state from t=60s. However, at t=90s, the fault index F began to fall below its threshold, at which point electronic switch 514 was disconnected, thus deactivating alarm 6.

[0079] The fire-fighting water supply hose with monitoring and alarm functions provided in this embodiment is based on the existing known hose structure, with only the addition of a pressure sensor group, controller, alarm, and cables for electrical connection. The overall structure is simple, low-cost, and easily modified from existing hose products. The pressure sensor is fixed to the inner wall of the hose body by adhesive bonding. The cable connecting the pressure sensor group and the controller passes through the first connector rather than the hose body itself. Therefore, the added pressure sensor group and cable do not cause any damage to the hose body, and no holes are needed on the hose body, thus preserving its service life. The controller and alarm are located on the first connector for connecting to the fire hose nozzle, facilitating on-site observation by operators. The controller includes a push-button switch, which is only closed by the operator to energize the hose when it is in use, thus saving battery power and ensuring the sensor's working life. If maintenance or component replacement is required, the hose assembly can be easily disassembled, the sensor group and cables removed from the hose body, and the relevant components inspected and replaced, making maintenance convenient.

[0080] The monitoring and alarm method for fire-fighting water supply hoses in this embodiment utilizes principles of fluid mechanics and statistics. It obtains the changes in static pressure head at various points by analyzing a series of measurement differences between two adjacent pressure sensors. If the changes in static pressure head at a certain point show a significant and concentrated increase within a short period, it is determined that there is excessive local resistance or a leakage fault at that point, and an alarm is triggered. Further referring to the description of the principles of this invention, it can be seen that the related alarm judgment method has simple logic, is easy to program and implement, can eliminate random and occasional factors to avoid false alarms, and can dynamically determine whether to issue an alarm or cancel an alarm based on the actual situation on site. Therefore, it has the characteristics of stability and reliability.

Claims

1. A monitoring and alarm method for fire-fighting water supply hoses with monitoring and alarm functions, capable of monitoring the water supply process of the hose and providing alarms when the hose experiences bending or leakage faults, characterized in that, The hose includes a first connector (1), a second connector (2), a hose body (3), a pressure sensor group (4), a controller (5), and an alarm (6). The first connector (1) and the second connector (2) are located at both ends of the hose body (3) and are mechanically connected to the ports at both ends of the hose body (3). Multiple pressure sensors are provided at equal intervals on the inner wall of the hose body (3) to form a pressure sensor group (4). The controller (5) is provided on the surface of the first connector (1). The controller (5) consists of a controller body (51) and a push-button switch (52) for the controller (5) to be in the open state. The alarm (6) and the pressure sensor group (4) are both electrically connected to the controller body (51) through cables. The method is to number the pressure sensors from 1 to N in the direction from the first connector (1) to the second connector (2), where N is the number of pressure sensors; when the fire water supply hose is used for water supply, close the button switch (52) to put the battery (513) into the power supply state, set the fault index F to the initial value 0 and put the electronic switch (514) into the default open state. At fixed intervals during the water supply process, the pressure values ​​measured by the pressure sensor group (4) are collected and analyzed once. The change of the fault index F is determined based on the analysis results. If the fault index F is greater than the preset threshold Fc at a certain moment during the water supply process, the electronic switch (514) is closed, thereby causing the alarm (6) to work and issue an alarm. If the fault index F is less than or equal to the preset threshold Fc at a certain moment during the water supply process, the electronic switch (514) is disconnected, thereby deactivating the alarm (6); wherein, the change of the fault index F during each data analysis process is determined by the following steps: Step S1: Organize the measurement results of all pressure sensors in the pressure sensor group (4) into a data sequence D = [d1, d2, ..., d...]. i , ...d N ], where d i The measurement result represents the pressure sensor numbered i; Step S2: The data sequence A = [d2-d1, d3-d2, ..., d...] is obtained by calculating the data sequence D. N -d (N-1) ]; Step S3: Calculate the mean μ and standard deviation σ of all elements in data sequence A, thereby obtaining the comparison benchmark value E = μ + Kσ, where K is greater than 2; Step S4: Compare all elements in data sequence A with the benchmark value E in turn. If there is an element in data sequence A that is greater than the benchmark value E, increase the fault index F by 1. If all elements in data sequence A are less than or equal to the benchmark value E, set the fault index F to the larger of the following two values: (i) The value of the failure index F obtained by reducing m from the original value, where m is between 0.1 and 0.5; (ii) The value is 0.

2. The monitoring and alarm method for a fire-fighting water supply hose with monitoring and alarm function as described in claim 1, characterized in that, The number of pressure sensors constituting the pressure sensor group (4) is between 5 and 100, and all pressure sensors are fixed to the inner wall of the hose body (3) by adhesive bonding.

3. The monitoring and alarm method for fire-fighting water supply hoses with monitoring and alarm functions as described in claim 1, characterized in that, The cable used to connect the pressure sensor group (4) passes through the first connector (1) and is then electrically connected to the controller body (51).

4. The monitoring and alarm method for fire-fighting water supply hoses with monitoring and alarm functions as described in claim 1, characterized in that, The controller body (51) includes a data acquisition module (511), a control module (512), a battery (513), and an electronic switch (514), wherein: The battery (513) is electrically connected to the push button switch (52) and its power supply and power-off states are controlled by the push button switch (52). The battery (513) is electrically connected to the acquisition module (511) and the control module (512). The battery (513) is also electrically connected to the electronic switch (514) and the alarm (6) in sequence. The acquisition module (511) is electrically connected to the pressure sensor group (4) and the control module (512) and is used to acquire pressure acquisition data from the pressure sensor group (4) in real time and transmit it to the control module (512). The control module (512) receives the data collected by the acquisition module (511) for analysis and calculation, and controls the closing and opening states of the electronic switch (514) according to the analysis results.

5. The monitoring and alarm method for a fire-fighting water supply hose with monitoring and alarm function as described in claim 1, characterized in that, The alarm (6) can be triggered by emitting sound, emitting light, or emitting both sound and light simultaneously.

6. The monitoring and alarm method for fire-fighting water supply hoses with monitoring and alarm functions as described in claim 1, characterized in that, The first connector (1) is used to connect to the fire hose to spray water to the fire site, and the second connector (2) is used to connect to the water intake to obtain fire water.

7. The monitoring and alarm method for a fire-fighting water supply hose with monitoring and alarm function as described in claim 1, characterized in that, The threshold Fc of the fault index F is greater than or equal to 2.

8. The monitoring and alarm method for a fire-fighting water supply hose with monitoring and alarm function as described in claim 1, characterized in that, The fixed time interval for pressure value acquisition and data analysis during the water supply process is between 1 second and 30 seconds.

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