An irrigation pipe network operation state monitoring device and method

Abstract

The application belongs to the technical field of irrigation pipe network, and discloses an irrigation pipe network operation state monitoring device and method. The device comprises a water flow assembly, a first temperature detection module, a second temperature detection module, a heating assembly and a control module. The heating assembly is arranged between the first temperature detection module and the second temperature detection module. The control module determines a measured temperature difference time sequence according to the measured temperature difference △T between the first water flow temperature T1 and the second water flow temperature T2 at any time within a first time threshold 测 . Then, according to the relationship between the measured temperature difference time sequence and a standard temperature difference time sequence, the fault type of the irrigation pipe network is determined. The problems of consuming manpower and low efficiency existing in manual inspection of the fault type are effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of irrigation pipe network, in particular to an irrigation pipe network operation state monitoring device and method. BACKGROUND

[0002] With the development of Internet technology and computer technology, water-saving irrigation systems are being popularized at an unprecedented speed. Reasonably promoting water-saving irrigation systems can not only improve resource utilization and alleviate the contradiction of water resources, but also increase crop yield and reduce the cost of agricultural products.

[0003] The inlet pipe of the existing irrigation pipe network is usually equipped with mechanical water meters or electromagnetic flow meters, while the branch pipes at the end of the irrigation pipe network are generally not equipped with flow monitoring devices. The irrigation pipe network below the branch pipes is mainly located in farmland and is greatly affected by the environment and agricultural operations, often causing damage, blockage, leakage and other problems, which are the most concentrated parts of failures.

[0004] Currently, maintenance personnel check whether the irrigation website has failed and the type of failure by patrolling, which not only consumes manpower but also is inefficient. Therefore, how to provide a solution to the above technical problems is a problem that needs to be solved by those skilled in the art. SUMMARY

[0005] The present application provides an irrigation pipe network operation state monitoring device and method to solve the problem of consuming manpower and low efficiency in manually checking the failure type of the irrigation pipe network in the prior art.

[0006] The present application provides an irrigation pipe network operation state monitoring device, comprising:

[0007] A water flow assembly having a water flow channel formed therein;

[0008] A first temperature detection module arranged in the water flow channel for detecting the water flow temperature at a first site of the water flow channel and recording as a first water flow temperature T1;

[0009] A second temperature detection module arranged downstream of the first temperature detection module for detecting the water flow temperature at a second site of the water flow channel and recording as a second water flow temperature T2;

[0010] A heating assembly located between the first temperature detection module and the second temperature detection module for heating the water flow in the water flow channel passing through the heating assembly;

[0011] A control module connected to the first temperature detection module, the second temperature detection module and the heating assembly;

[0012] The control module determines a measured temperature difference time sequence according to a difference between the first water flow temperature T1 and the second water flow temperature T2 at any moment within a first time threshold range; and determines a fault type of the irrigation pipe network according to a relationship between the measured temperature difference time sequence and the standard temperature difference time sequence.

[0013] The standard temperature difference time sequence includes a plurality of standard temperature difference values; the standard temperature difference value is a temperature difference value of two points of the irrigation pipe network at any moment within a second time threshold range under a normal working condition, and the first time threshold range is the same as the second time threshold range.

[0014] The irrigation pipe network operation state monitoring device provided in the application comprises a heating assembly, a first temperature detection module, a second temperature detection module and a control module.

[0015] The heating guide plate is arranged between the first temperature detection module and the second temperature detection module, and is used for distributing heat of the heat pulse heating source to water flow.

[0016] The irrigation pipe network operation state monitoring device provided in the application further comprises:

[0017] A guide assembly is arranged upstream of the first temperature detection module and / or downstream of the second temperature detection module.

[0018] The irrigation pipe network operation state monitoring device provided in the application further comprises:

[0019] A communication module is connected with the control module, and is used for respectively connecting the control module, the first temperature detection module, the second temperature detection module and the heating assembly with a total control system of the irrigation pipe network.

[0020] The application further provides an irrigation pipe network operation state monitoring method, which comprises the following steps:

[0021] S200, obtaining a measured temperature difference time sequence

[0022] The measured temperature difference time sequence includes a plurality of measured temperature difference values ΔT 测 , and each measured temperature difference value ΔT 测 corresponds to a moment; the measured temperature difference value ΔT 测 is a temperature difference value of two points of water flow at any moment within a first time threshold range.

[0023] S300, determining a fault type of the irrigation pipe network according to a relationship between the measured temperature difference time sequence and a standard temperature difference time sequence.

[0024] The standard temperature difference time sequence includes a plurality of standard temperature difference values ΔT 标 , and each of the standard temperature difference values ΔT 标 corresponds to a time point; the standard temperature difference value ΔT 标 is a temperature difference value of the irrigation pipe network at any time point within a second time threshold range under a normal working condition of the irrigation pipe network, and the first time threshold range is the same as the second time threshold range.

[0025] According to the irrigation pipe network operation state monitoring method, S200, a measured temperature difference time sequence is acquired, specifically including the following steps:

[0026] Within the first time threshold range, the water flow temperatures of a first site and a second site downstream of the first site are continuously collected and recorded as a first water flow temperature T1 and a second water flow temperature T2, respectively; a measured temperature difference value ΔT 测 at any time point within the first time threshold range is determined according to the first water flow temperature T1 and the second water flow temperature T2, and then the measured temperature difference time sequence is determined.

[0027] According to the irrigation pipe network operation state monitoring method, S300, the relationship between the measured temperature difference time sequence and the standard temperature difference time sequence is determined to determine the fault type of the irrigation pipe network, specifically including the following steps:

[0028] S310, the absolute value ΔT 绝对值 of the difference between the measured temperature difference value ΔT 测 and the standard temperature difference value ΔT 标 at the same time point is calculated.

[0029] S320, the relationship between the absolute value ΔT 绝对值 of the difference and a first temperature threshold and a second temperature threshold is determined to determine whether a fault occurs in the irrigation pipe network.

[0030] S330, if a fault occurs in the irrigation pipe network, the actual difference ΔT 实际 between the standard temperature difference value ΔT 标 and the measured temperature difference value ΔT 测 at the same time point is calculated.

[0031] The relationship between the time point at which the actual difference ΔT 实际 firstly changes from positive to negative and a reference time point is determined to determine the fault type; the reference time point is the time point corresponding to the maximum standard temperature difference value ΔT 标 .

[0032] According to the irrigation pipe network operation state monitoring method, S320, the relationship between the absolute value ΔT 绝对值Determine whether the irrigation pipe network is in failure state according to the relationship between the first temperature threshold value and the second temperature threshold value, specifically comprising:

[0033] If the absolute value of the difference value ΔT 绝对值 is less than the first temperature threshold value, it is determined that the irrigation pipe network is in normal operation state;

[0034] If the absolute value of the difference value ΔT 绝对值 is greater than or equal to the first temperature threshold value and less than or equal to the second temperature threshold value, it is determined that the irrigation pipe network is in early warning state;

[0035] If the absolute value of the difference value ΔT 绝对值 is greater than the second temperature threshold value, it is determined that the irrigation pipe network is in failure state.

[0036] According to the irrigation pipe network operation state monitoring method, the actual difference value ΔT 实际 at S330 is determined according to the relationship between the time when the positive and negative change occurs for the first time and the reference time, and the type of failure is determined, specifically comprising:

[0037] If the actual difference value ΔT 实际 changes from positive to negative for the first time, and the time when the actual difference value ΔT 实际 changes from positive to negative for the first time is less than the reference time, it is determined that the failure of the irrigation pipe network is pipe rupture or leakage;

[0038] If the actual difference value ΔT 实际 changes from negative to positive for the first time, and the time when the actual difference value ΔT 实际 changes from negative to positive for the first time is greater than the reference time, it is determined that the failure of the irrigation pipe network is blockage or bending and extrusion.

[0039] According to the irrigation pipe network operation state monitoring method, before S200, the following steps are further included:

[0040] S100, acquiring a standard temperature difference time sequence

[0041] When the irrigation pipe network is in normal operation state, the water flow temperatures of the first site and the second site downstream of the first site are continuously collected within the second time threshold value range, and are recorded as the first standard water flow temperature T 标1 and the second standard water flow temperature T 标2 respectively.

[0042] According to the first standard water flow temperature T 标1 and the second standard water flow temperature T 标2 , the standard temperature difference value ΔT 标 at any time within the second time threshold value range is determined, and the standard temperature difference time sequence is further determined.

[0043] The irrigation pipe network operation state monitoring device and method provided by the application, by setting a first temperature detection module and a second temperature detection module upstream of the water flow, setting a heating assembly between the first temperature detection module and the second temperature detection module for heating the water flow, determining the measured temperature difference time sequence according to the measured temperature difference between the first water flow temperature T1 and the second water flow temperature T2 at any time within the first time threshold 测 , determining the fault type of the irrigation pipe network according to the relationship between the measured temperature difference time sequence and the standard temperature difference time sequence, which can effectively solve the problems of manpower consumption and low efficiency in manual inspection of fault types. At the same time, because the application does not use traditional electromagnetic flow meters and ultrasonic flow meters in determining the fault type of the irrigation pipe network, the irrigation pipe network operation state monitoring device of the application has low cost and simple installation and maintenance, effectively solving the problems of high cost and difficult maintenance of the current irrigation system flow automatic measurement system. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0045] Figure 1 is a structural schematic diagram of the irrigation pipe network operation state monitoring device provided by the application;

[0046] Figure 2 is a flow schematic diagram of the irrigation pipe network operation state monitoring method provided by the application.

[0047] Explanation:

[0048] 1, water flow assembly; 2, first temperature detection module; 3, second temperature detection module; 4, heating assembly; 5, control module; 8, display module; 9, communication module;

[0049] 11, pipe joint; 41, thermal pulse heating source; 42, heating guide plate; 51, setting button; 52, adjusting knob; 61, first guide member; 62, second guide member; 71, water power generation structure; 72, solar photovoltaic panel;

[0050] 711, water flow generator; 712, water turbine. DETAILED DESCRIPTION

[0051] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in conjunction with the drawings in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0052] As shown in Figure 1 Embodiments of the present application provide an irrigation pipe network operation state monitoring device. The irrigation pipe network operation state monitoring device is usually installed in the irrigation pipe network in the farmland, and can also be installed at other positions of the irrigation pipe network, and the installation position is not limited in the specific embodiments of the present application. The irrigation pipe network operation state monitoring device comprises a water flow assembly 1, a first temperature detection module 2, a second temperature detection module, a heating assembly 4 and a control module 5. The heating assembly 4 is arranged between the first temperature detection module 2 and the second temperature detection module.

[0053] A water flow channel is formed in the water flow assembly 1, and the two ends of the water flow assembly 1 are connected with the pipelines of the irrigation pipe network, so that the water in the pipelines enters the water flow channel. The structure of the water flow assembly 1 is not limited in the specific embodiments, as long as the water flow assembly 1 has a water flow channel inside and the two ends of the water flow assembly 1 can be connected with the pipelines. However, in view of the appearance and practicability, the water flow assembly 1 is preferably a water pipe, and the two ends of the water pipe are connected with the pipelines of the irrigation pipe network through pipe joints 11, so that the water in the pipelines flows into the water pipe. The size of the water pipe is not limited, but in order to match the pipe, the length of the water pipe is 50 cm and the diameter is 70 mm in the specific embodiments.

[0054] The first temperature detection module 2 is arranged upstream of the water flow in the water pipe, and is used to detect the water flow temperature flowing into the water pipe, and record the water flow temperature as the first water flow temperature T1.

[0055] The heating assembly 4 and the second temperature detection module 3 are arranged downstream of the first temperature detection module 2 in sequence, and the water flowing through the first temperature detection module 2 first passes through the heating assembly 4 to be heated, and then flows to the second temperature detection module 3, and finally flows out of the water pipe.

[0056] The second temperature detection module 3 is used to detect the water flow temperature heated by the heating assembly 4, and record the water flow temperature as the second water flow temperature T2.

[0057] The control module 5 is connected with the first temperature detection module 2, the second temperature detection module 3 and the heating assembly 4; and the control module 5 calculates the measured temperature difference AT 测, and the control module 5 determines the fault type of the irrigation pipe network according to the relationship between the measured temperature difference time sequence and the standard temperature difference time sequence;

[0058] The standard temperature difference time sequence includes a plurality of standard temperature difference values ΔT 标 The standard temperature difference value ΔT 标 is a temperature difference value of the two sites in the second time threshold range at any moment under the normal working condition of the irrigation pipe network, and the first time threshold range is the same as the second time threshold range.

[0059] The application determines the measured temperature difference time sequence according to the measured temperature difference value ΔT 测 of the first water flow temperature T1 and the second water flow temperature T2 in the first time threshold range at any moment, and determines the fault type of the irrigation pipe network according to the relationship between the measured temperature difference time sequence and the standard temperature difference time sequence. That is, the device of the application determines the fault type by the temperature of the water flow in the water pipe. The application does not use the traditional electromagnetic flowmeter and ultrasonic flowmeter when determining the fault type of the irrigation pipe network, so that the irrigation pipe network operation state monitoring device of the application has low cost and simple installation and maintenance, and effectively solves the problems of high cost and difficult maintenance of the current irrigation system flow automatic measurement system.

[0060] In order to ensure the consistency of the working parameters of the first temperature detection module 2 and the second temperature detection module 3, the first temperature detection module and the second temperature detection module are connected with the control module through temperature compensation wires, that is, the first temperature detection module and the second temperature detection module are adjusted by the control module. The distance between the first temperature detection module and the heating assembly is equal to the distance between the second temperature detection module and the heating assembly. The first temperature detection module is close to the water inlet of the water pipe, the second temperature detection module is close to the water outlet of the water pipe, and the distance between the first temperature detection module and the second temperature detection module is preferably 20 cm.

[0061] In order to reduce the system error in the detection process, the first temperature detection module and the second temperature detection module in the embodiment of the application adopt high-precision temperature sensors, preferably PT100, 1 / 3B level, and the precision of the temperature sensor is 0.1℃. The temperature compensation wire is a three-core silver-plated fluorine shielding wire, which is also used to reduce the system error and ensure the consistency of the working parameters of the first temperature detection module and the second temperature detection module.

[0062] In the specific embodiments of the present application, the irrigation pipe network operation state monitoring device further comprises a connecting piece, which is used to fix the water flow assembly at the installation position. When the water flow assembly is a water pipe, the connecting piece is preferably a pipe clamp. Of course, the connecting piece can be any structure as long as it can fix the water flow assembly at the installation position.

[0063] In the specific embodiments of the present application, the heating assembly 4 comprises a heat pulse heating source 41 and a heating flow guide plate 42 connected with the heat pulse heating source 41; the heating flow guide plate 42 is arranged between the first temperature detection module 2 and the second temperature detection module, and is used to distribute the heat of the heating source to the water flow.

[0064] In the specific embodiments of the present application, the heating flow guide plate 42 comprises a plurality of heating fins, the heating flow guide plate 42 is arranged at the middle position of the water pipe, and the heating fins are arranged along the direction of the water flow. In the specific embodiments, the size of the heating flow guide plate 42 is preferably: the length is 30 mm, the width is 15 mm, and the thickness is 6 mm. Moreover, the power of the heating flow guide plate 42 is preferably 100 W, and a battery direct current 24 V safe voltage is used for power supply, and the heating time is set and adjusted by the control module 5. The heat pulse (heat trace) technology for measuring flow is widely used in the petroleum industry, the measurement of plant water consumption (stem flow), etc.

[0065] In the specific embodiments of the present application, the irrigation pipe network operation state monitoring device further comprises a flow guide assembly; the flow guide assembly is arranged upstream of the first temperature detection module 2, or / and downstream of the second temperature detection module 3. It is understood that: the flow guide assembly is arranged only upstream of the first temperature detection module 2; the flow guide assembly is arranged only downstream of the second temperature detection module 3; or, the flow guide assembly is arranged both upstream of the first temperature detection module 2 and downstream of the second temperature detection module 3.

[0066] Further, the flow guide assembly comprises a first flow guide piece 61 and a second flow guide piece 62; the first flow guide piece 61 is arranged upstream of the first temperature detection module 2; the second flow guide piece 62 is arranged downstream of the second temperature detection module. The first flow guide piece 61 is used to maintain the stability of the water flow state on the upstream side; the second flow guide piece 62 is used to stabilize the pipe water flow state and maintain the stability of the flow field. In addition, the structure of the first flow guide piece 61 and the second flow guide piece 62 is not limited, which can be a wing-shaped flow guide grid or the like.

[0067] In the specific embodiments of the present application, the control module 5 comprises:

[0068] The data storage unit is connected with the first temperature detection module 2, the second temperature detection module 3 and the heating assembly 4; is used to record and store the first water flow temperature T1 and the second water flow temperature T2 at any time within the first time threshold range; and is further used to store the standard temperature difference time sequence.

[0069] The data processing unit is connected with the data storage unit, and is configured to calculate a measured temperature difference AT according to the first water flow temperature T1 and the second water flow temperature T2 stored in the data storage unit, and to send the measured temperature difference AT to the data storage unit for storage to form a measured temperature difference time sequence. 测 The data processing unit is connected with the data storage unit, and is configured to calculate a measured temperature difference AT according to the first water flow temperature T1 and the second water flow temperature T2 stored in the data storage unit, and to send the measured temperature difference AT to the data storage unit for storage to form a measured temperature difference time sequence. 测 The data processing unit is connected with the data storage unit, and is configured to calculate a measured temperature difference AT according to the first water flow temperature T1 and the second water flow temperature T2 stored in the data storage unit, and to send the measured temperature difference AT to the data storage unit for storage to form a measured temperature difference time sequence.

[0070] The data processing unit is connected with the data storage unit, and is configured to calculate a measured temperature difference AT according to the first water flow temperature T1 and the second water flow temperature T2 stored in the data storage unit, and to send the measured temperature difference AT to the data storage unit for storage to form a measured temperature difference time sequence.

[0071] The control module 5 further comprises a setting button 51 and an adjusting knob 52; the system parameters of the device can be adjusted through the setting button 51, for example, the on-off time of the heat pulse heating source 41 is set. The working parameters of the first temperature detection module 2 and the second temperature detection module are fine-tuned through the adjusting knob 52, so that the working parameters of the first temperature detection module 2 and the second temperature detection module are kept consistent as much as possible.

[0072] In the specific embodiment of the present application, the irrigation pipe network operation state monitoring device further comprises a power supply module; the power supply module is configured to supply power to the first temperature detection module, the second temperature detection module, the heating assembly and the control module. The specific structure of the power supply module is not limited.

[0073] The power supply module comprises a battery, and the battery is configured to supply power to the heat pulse heating source.

[0074] The power supply module comprises a water power generation structure 71; the water power generation structure 71 is at least partially arranged in the water flow channel, and the water power generation structure 71 arranged in the water flow channel is further arranged downstream of the second temperature detection module 3; the water power generation structure 71 is configured to collect the residual water energy at the end of the water flow channel, and convert the water energy into electric energy to supply power to the first temperature detection module 2, the second temperature detection module 3, the heating assembly 4 and the control module 5.

[0075] Further, the water power generation structure 71 comprises a water power generator and a water turbine 712; the water power generator is arranged outside the water flow channel, and is configured to supply power to the first temperature detection module 2, the second temperature detection module 3 and the heating assembly 4; the water turbine 712 is arranged downstream of the second temperature detection module 3, and is configured to collect the residual water energy in the water flow channel to drive the water power generator to generate electricity. Preferably, the water turbine 712 is a pipeline type micro water turbine 712.

[0076] For example, the power supply module further comprises a solar photovoltaic panel 72; the solar photovoltaic panel 72 is used to supply power to the control module 5. The solar photovoltaic panel 72 is arranged on the top of the control module 5. That is, the water conservancy power generation structure 71 is used to supply power to the first temperature detection module 2 and the second temperature detection module 3, and the solar photovoltaic panel 72 is used to supply power to the control module 5. The battery is used to supply power to the pulse heating source of the heating assembly 4.

[0077] In the embodiment of the present application, the irrigation pipe network operation state monitoring device further comprises a display module 8 connected with the control module 5, used to display the graph of the standard temperature difference time sequence and the measured temperature difference time sequence.

[0078] In the specific embodiment of the present application, the irrigation pipe network operation state monitoring device further comprises a communication module 9; the communication module 9 is used to respectively communicate the control module 5, the first temperature detection module 2, the second temperature detection module 3 and the heating assembly 4 with the total control system of the irrigation pipe network.

[0079] The communication module 9 is used to communicate the control module 5 with the total control system of the irrigation pipe network, so as to realize the transmission of data and the feedback of information between the control module 5 and the total control system.

[0080] The communication module 9 is used to communicate the first temperature detection module 2, the second temperature detection module 3 and the heating assembly 4 with the total control system of the irrigation pipe network, that is, the user can control the first temperature detection module 2, the second temperature detection module 3 and the heating assembly 4 through the total control system, and the data transmission and the signal feedback.

[0081] The communication module 9 comprises but is not limited to a wireless antenna.

[0082] As shown in Figure 2 The present application further provides an irrigation pipe network operation state monitoring method, which comprises the following steps:

[0083] S200, acquiring a measured temperature difference time sequence

[0084] The measured temperature difference time sequence comprises a plurality of measured temperature difference values ΔT 测 , and each measured temperature difference value ΔT 测 corresponds to a time point; the measured temperature difference value ΔT 测 is a temperature difference value of two sites upstream and downstream of the water flow at any time within a first time threshold.

[0085] S300, determining the fault type of the irrigation pipe network according to the relationship between the measured temperature difference time sequence and the standard temperature difference time sequence.

[0086] The standard temperature difference time sequence comprises a plurality of standard temperature difference values ΔT 标; standard temperature difference △T 标 is the temperature difference of the irrigation pipe network under normal working conditions, the temperature difference of two points at any time within the second time threshold range, and the first time threshold range is the same as the second time threshold range.

[0087] The method of the present application detects the water flow temperature at two different points in the water flow channel, i.e. the first water flow temperature T1 and the second water flow temperature T2; and determines the measured temperature difference time sequence according to the measured temperature difference △T 测 of the first water flow temperature T1 and the second water flow temperature T2 at any time within the first time threshold range; and determines the fault type of the irrigation pipe network according to the relationship between the measured temperature difference time sequence and the standard temperature difference time sequence.

[0088] The first time threshold range and the second time threshold range are the time range for heating the water flow passing through the first point, preferably 0s-20s.

[0089] In a specific embodiment of the present application, S200, the measured temperature difference time sequence is obtained, specifically including the following steps:

[0090] Within the first time threshold range, the water flow temperature of the first point and the second point downstream of the first point is continuously collected, and recorded as the first water flow temperature T1 and the second water flow temperature T2 respectively; the measured temperature difference △T 测 at any time within the first time threshold range is determined according to the first water flow temperature T1 and the second water flow temperature T2, and the measured temperature difference time sequence is further determined.

[0091] That is, the measured temperature difference △T 测 , the second water flow temperature T2 and the first water flow temperature T1 at the same time satisfy the following relationship:

[0092] △T 测 =T2-T1

[0093] In a specific embodiment of the present application, S300, the relationship between the measured temperature difference time sequence and the standard temperature difference time sequence is determined to determine the fault type of the irrigation pipe network, specifically including the following steps:

[0094] S310, the absolute value △T 绝对值 of the difference between the measured temperature difference △T 测 and the standard temperature difference △T 标 at the same time is calculated;

[0095] S320, according to the relationship between the absolute value △T 绝对值 of the difference and the first temperature threshold and the second temperature threshold, it is determined whether the irrigation pipe network has failed;

[0096] S330, if the irrigation pipe network fails, the standard temperature difference value ΔT at the same time is calculated 标 and the actual difference value ΔT 测 of the measured temperature difference value ΔT 实际 ;

[0097] According to the relationship between the actual difference value ΔT 实际 of the first positive and negative change and the reference time, the fault type is determined; wherein, the reference time is the maximum standard temperature difference value ΔT 标 corresponding to the time.

[0098] Wherein, the measured temperature difference value ΔT 测 , the standard temperature difference value ΔT 标 and the absolute value ΔT 绝对值 of the difference value at the same time satisfy the following relationship:

[0099] △T 绝对值 = |△T 标 -△T 测 |

[0100] The standard temperature difference value ΔT 标 , the measured temperature difference value ΔT 测 and the actual difference value ΔT 实际 at the same time satisfy the following relationship:

[0101] △T 实际 =△T 标 -△T 测

[0102] Wherein, the first temperature threshold is any temperature value in the first temperature threshold range; the second temperature threshold is any temperature value in the second temperature threshold range. The first temperature threshold range and the second temperature threshold range are pre-set in the control system according to the actual situation. For example, in the embodiment of the present application, the first temperature threshold range is preferably 0.4-0.6℃. The second temperature threshold range is preferably 0.9-1.1℃. In the embodiment of the present application, the first temperature threshold is preferably 0.5℃; the second temperature threshold is preferably 1℃.

[0103] In a specific embodiment of the present application, S320, according to the relationship between the absolute value ΔT 绝对值 of the difference value and the first temperature threshold and the second temperature threshold, it is determined whether the irrigation pipe network fails, specifically including:

[0104] If the absolute value ΔT 绝对值 of the difference value is less than the first temperature threshold, it means that the irrigation pipe network is in normal operation state, and the user does not need to handle the irrigation pipe network;

[0105] If the absolute value ΔT 绝对值If the temperature is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold, it indicates that the irrigation network is in an early warning state, prompting users to pay attention to the irrigation network in a timely manner. At the same time, users can estimate when the irrigation network may fail through the early warning.

[0106] If the absolute value of the difference is ΔT 绝对值 If the temperature exceeds the second temperature threshold, it indicates that the irrigation network is in a faulty state.

[0107] In a specific embodiment of the present invention, in S330, based on the actual difference △T 实际 The relationship between the moment of the first positive-to-negative transition and the reference time is used to determine the fault type, specifically including:

[0108] If the actual difference △T 实际 The value first changes from positive to negative, and the actual difference ΔT 实际 If the time when the first negative value is less than the reference time, the fault in the irrigation network is determined to be a pipe rupture or leakage.

[0109] If the actual difference △T 实际 The first time it changed from a negative value to a positive value, and the actual difference ΔT 实际 If the first positive value is greater than the baseline time, then the fault in the irrigation network is determined to be blockage or bending / squeezing.

[0110] It should be noted that, in specific embodiments of the present invention, the standard temperature difference time series can be preset in the control system. Alternatively, the standard temperature difference time series can be obtained by actual measurement and calculation after the pipeline network has been built (at which point the pipeline network is in normal operation).

[0111] In actual use, the pre-set standard temperature difference time series may deviate significantly from the actual standard temperature difference time series during normal operation of the irrigation network due to varying external environments (e.g., some networks are laid on mountainous terrain, others on steep slopes). This leads to inaccurate judgment results. Therefore, in this embodiment of the invention, the standard temperature difference time series is preferably obtained by actual measurement and calculation after the network is constructed (at which point the network is in normal operation). That is, before obtaining the measured temperature difference time series in S200 of this invention, the following steps are also included:

[0112] S100. Obtain the standard temperature difference time series:

[0113] When the irrigation network is in normal operation, within the second time threshold range, the water flow temperature at the first point and the second point downstream of the first point is continuously collected and recorded as the first standard water flow temperature T. 标1 Second standard water flow temperature T 标2 ;

[0114] According to the first standard water flow temperature T 标1 Second standard water flow temperature T 标2 Determine the standard temperature difference ΔT at any time within the first time threshold range. 标 This allows for the determination of the standard temperature difference time series.

[0115] Among them, the first standard water flow temperature T 标1 Second standard water flow temperature T 标2 The temperature difference between the standard and the standard temperature ΔT 标 The following relationship must be satisfied:

[0116] △T 标 =T 标2 -T 标1

[0117] In addition, to minimize systematic errors and avoid noise interference, the standard temperature difference ΔT at each moment in the standard temperature difference time series is set to a specific value. 标 It is the average value obtained by measuring the water flow temperature at two locations multiple times at the same time.

[0118] The following describes the irrigation network operation status monitoring method of the present invention in detail, using the irrigation network operation status monitoring device of the present invention as an example. The method includes the following steps:

[0119] S100, Obtain the standard temperature difference time series

[0120] After the irrigation network begins normal irrigation, the control module controls the power supply module (battery) to energize the heat pulse heating source in the heating assembly. At each third time threshold (e.g., 3 minutes), the control module energizes the heating assembly at a time threshold of 20 seconds. The instant the heating assembly is energized, the control module begins recording the detection values ​​from the first and second temperature detection modules. That is, within the second time threshold range (0 seconds to 20 seconds), the water flow temperature at the first point (first temperature detection module) and the second point downstream of the first point (second temperature detection module) is continuously collected and recorded as the first standard water flow temperature T. 标1 Second standard water flow temperature T 标2 ;

[0121] The control module is based on the first standard water flow temperature T 标1 Second standard water flow temperature T 标2 Calculate the standard temperature difference ΔT between two locations at the same time. 标 Multiple standard temperature differences △T 标 and each standard temperature difference ΔT 标 The corresponding times form a standard temperature difference time series.

[0122] In addition, to minimize systematic errors and avoid noise interference, the standard temperature difference ΔT at each moment in the standard temperature difference time series is set to a specific value. 标 It is the average value obtained by measuring the water flow temperature at two locations multiple times at the same time.

[0123] S200, Obtain the measured temperature difference time series

[0124] Within the first time threshold range (0s~20s), the control module continuously collects the detection values ​​of the first temperature detection module and the second temperature detection module, and records them as the first water flow temperature T1 and the second water flow temperature T2, respectively.

[0125] The control module calculates the measured temperature difference ΔT between the two locations at the same time based on the first water flow temperature T1 and the second water flow temperature T2. 测 Multiple measured temperature differences ΔT 测 and each measured temperature difference ΔT 测 The corresponding times form a time series of measured temperature differences;

[0126] S310, The control module calculates the measured temperature difference ΔT at the same time. 测 Temperature difference from standard ΔT 标 The absolute value of the difference △T 绝对值 ;

[0127] S320, the control module determines the absolute value of the difference △T based on... 绝对值 The relationship between the temperature and the first and second temperature thresholds is used to determine whether a fault has occurred in the irrigation network, specifically including:

[0128] If the absolute value of the difference is ΔT 绝对值 If the temperature is below the first temperature threshold, the irrigation network is determined to be in normal operating condition.

[0129] If the absolute value of the difference is ΔT 绝对值 If the temperature is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold, the irrigation network is determined to be in an early warning state.

[0130] If the absolute value of the difference is ΔT 绝对值 If the temperature exceeds the second temperature threshold, the irrigation network is determined to be in a fault state.

[0131] S330. If the irrigation network fails, calculate the standard temperature difference ΔT at the same time. 标 The difference between the measured temperature and the actual temperature △T 测 The actual difference △T 实际 ;

[0132] If the actual difference △T 实际 The value first changes from positive to negative, and the actual difference ΔT 实际If the time point when the first negative value appears is less than the reference time point, it is determined that the fault of the irrigation pipe network is pipe breakage or leakage.

[0133] If the actual difference AT is less than the reference difference AT 实际 If the first negative value changes to a positive value and the actual difference AT 实际 If the time point when the first positive value appears is greater than the reference time point, it is determined that the fault of the irrigation pipe network is blockage or bending extrusion; wherein the reference time point is the maximum standard temperature difference AT 标 The corresponding time point.

[0134] The apparatus embodiments described above are merely illustrative, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the present embodiment scheme according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0135] Through the description of the above embodiments, those skilled in the art can clearly understand that the embodiments can be realized by means of software and the necessary general hardware platform, and of course, can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0136] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An apparatus for monitoring the operating state of an irrigation pipe network, connected to a pipe of the irrigation pipe network, characterized in that, The method comprises the following steps: A water flow assembly (1) internally forms a water flow channel; A first temperature detection module (2) is arranged in the water flow channel and is used to detect the water flow temperature at a first position of the water flow channel and record the first water flow temperature T1; A second temperature detection module (3) is arranged downstream of the first temperature detection module (2) and is used to detect the water flow temperature at a second position of the water flow channel and record the second water flow temperature T2; A heating assembly (4) is arranged between the first temperature detection module (2) and the second temperature detection module (3) and is used to heat the water flow in the water flow channel that passes through the heating assembly (4); A control module (5) is connected with the first temperature detection module (2), the second temperature detection module (3) and the heating assembly (4); The control module determines a measured temperature difference time sequence according to the difference between the first water flow temperature T1 and the second water flow temperature T2 at any time within a first time threshold range, and determines the fault type of the irrigation pipe network according to the relationship between the measured temperature difference time sequence and a standard temperature difference time sequence; The measured temperature difference time sequence comprises a plurality of measured temperature difference values and the time corresponding to each measured temperature difference value, the standard temperature difference time sequence comprises a plurality of standard temperature difference values, the standard temperature difference value is the temperature difference value of two positions at any time within a second time threshold range under the normal working condition of the irrigation pipe network, and the first time threshold range is the same as the second time threshold range; The control module determines the fault type of the irrigation pipe network according to the relationship between the measured temperature difference time sequence and the standard temperature difference time sequence, and specifically comprises the following steps: calculating the measured temperature difference AT at the same time 测 the absolute value of the difference between the standard temperature difference AT 标 and the measured temperature difference AT 绝对值 ; According to the absolute value of the difference value ΔT 绝对值 In relation to the first temperature threshold value, the second temperature threshold value, determine whether the irrigation pipe network has a failure; If the irrigation pipe network fails, the standard temperature difference value AT at the same time is calculated 标 The actual difference AT between the measured temperature difference AT 测 and the standard temperature difference AT 实际 ; if the actual difference AT 实际 the first time the actual difference AT 实际 if the first time the actual difference AT is less than the reference time, it is determined that the fault of the irrigation pipe network is a pipe break or leakage. if the actual difference AT 实际 the first time the actual difference AT 实际 if the first time the actual difference AT is positive is greater than the reference time, it is determined that the fault of the irrigation pipe network is clogging or bending and extrusion; Wherein, the reference time is the maximum standard temperature difference AT 标 The corresponding time.

2. The irrigation pipe network operating condition monitoring apparatus according to claim 1, characterized in that, The heating assembly (4) comprises a heat pulse heating source (41) and a heating flow guide plate (42) connected with the heat pulse heating source (41); The heating flow guide plate (42) is arranged between the first temperature detection module (2) and the second temperature detection module (3).

3. The irrigation pipe network operating condition monitoring apparatus according to claim 1, characterized by, Further comprising: A flow guide assembly arranged upstream of the first temperature detection module (2) or / and arranged downstream of the second temperature detection module (3).

4. An irrigation pipe network operating condition monitoring apparatus according to any one of claims 1 to 3, characterised in that, Further comprising: A communication module (9) connected with the control module (5) and used to respectively connect the control module (5), the first temperature detection module (2), the second temperature detection module (3) and the heating assembly (4) with a total control system of the irrigation pipe network.

5. A method of monitoring the operating state of an irrigation pipe network, characterized in that The method comprises: S200, acquiring a measured temperature difference time sequence; The measured temperature difference time series includes a plurality of measured temperature difference values ΔT 测 , and each of the measured temperature difference values ΔT 测 corresponds to a time point; the measured temperature difference value ΔT 测 is a temperature difference value of water flow at any time point within a first time threshold range between two sites upstream and downstream. S300, determining the fault type of the irrigation pipe network according to the relationship between the measured temperature difference time sequence and a standard temperature difference time sequence; The standard temperature difference time sequence includes a plurality of standard temperature difference values ΔT 标 , and each of the standard temperature difference values ΔT 标 corresponds to a time point; the standard temperature difference value ΔT 标 is a temperature difference value of the irrigation pipe network at any time point within a second time threshold range under a normal working condition of the irrigation pipe network, and the first time threshold range is the same as the second time threshold range. S300, determining the fault type of the irrigation pipe network according to the relationship between the measured temperature difference time sequence and the standard temperature difference time sequence, specifically comprising the following steps: S310、calculating the measured temperature difference △T at the same time 测 the absolute value of the difference between the standard temperature difference △T 标 绝对值 ;​ S320, determining whether the absolute value of the difference value ΔT is greater than a first temperature threshold value or a second temperature threshold value 绝对值 determining whether the irrigation pipe network has a fault in relation to the first temperature threshold value and the second temperature threshold value; S330, if the irrigation pipe network fails, calculate the standard temperature difference value AT at the same time 标 The actual difference AT of the measured temperature difference AT 测 实际 ;​ if the actual difference AT 实际 the first time the actual difference AT 实际 if the first time the actual difference AT is less than the reference time, it is determined that the fault of the irrigation pipe network is a pipe break or leakage. if the actual difference AT 实际 the first time the actual difference AT 实际 if the first time the actual difference AT is positive is greater than the reference time, it is determined that the fault of the irrigation pipe network is clogging or bending and extrusion.

6. The irrigation pipe network operating condition monitoring method according to claim 5, characterized in that, S200, acquiring a measured temperature difference time sequence, specifically comprising the following steps: Within a first time threshold range, the water flow temperature of the first site and the second site downstream of the first site are continuously collected, and recorded as a first water flow temperature T1 and a second water flow temperature T2 respectively; the measured temperature difference △T at any time within the first time threshold range is determined according to the first water flow temperature T1 and the second water flow temperature T2 测 , and further to determine a measured temperature difference time sequence.

7. The irrigation pipe network operating condition monitoring method according to claim 5, characterized in that, S320, determining the absolute value AT of the difference value 绝对值 In relation to the first temperature threshold and the second temperature threshold, it is determined whether the irrigation pipe network has failed, specifically comprising: If the absolute value of the difference AT 绝对值 is less than a first temperature threshold, the irrigation pipe network is determined to be in a normal operating state. If the absolute value of the difference AT 绝对值 is greater than or equal to a first temperature threshold and less than or equal to a second temperature threshold, the irrigation pipe network is determined to be in a pre-warning state. If the absolute value of the difference AT 绝对值 is greater than a second temperature threshold, it is determined that the irrigation pipe network is in a fault state.

8. A method of monitoring the operating state of an irrigation pipe network according to any one of claims 5 to 7, characterised in that, Before S200 acquires the measured temperature difference time sequence, the following steps are further included: S100, acquiring a standard temperature difference time sequence; When the irrigation pipe network is in a normal operating state, the water flow temperature of the first site and the second site downstream of the first site are continuously collected within a second time threshold range, and are recorded as a first standard water flow temperature T 标1 and a second standard water flow temperature T 标2 , respectively. According to the first criterion the water flow temperature T 标1 and the second criterion the water flow temperature T 标2 determining the standard temperature difference value ΔT 标 at any time within the second time threshold range, and further determining a standard temperature difference time series.

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