Blockage detection method applied to rain gauge

Abstract

The invention provides a blockage detection method applied to a rain gauge, belongs to the field of rainfall monitoring, and is used for solving the problem of poor reliability of a rainfall monitoring device in related technologies. In the method, a rainfall monitoring module is used for collecting rainfall monitoring data, and a rainfall intensity monitoring module is used for monitoring rainfall intensity data; the rainfall monitoring data and the rainfall intensity monitoring data are integrated to determine device state data, so that the rainfall monitoring data is difficult to find after distortion or errors are avoided, rainfall monitoring blockage failure caused by sundries can be found in time, and a certain monitoring effect on the rainfall condition can be kept through rainfall intensity monitoring after the rainfall monitoring failure; therefore, the rainfall condition can be monitored more reliably.

Description

Technical Field

[0001] The present application relates to the field of comprehensive monitoring of rainfall and rainfall intensity dual variables, and in particular to a blockage detection method applied to a rain gauge. Background Art

[0002] Rainfall is one of the main factors leading to flood disasters, so rainfall monitoring is also one of the main means of flood forecasting. At present, rainfall monitoring is generally achieved through rain gauges, and most of the rain gauges in actual use are tipping bucket rain gauges. The structure of tipping bucket rain gauges makes it easy to be affected by leaves, flying catkins, pine nuts, dust, insect carcasses and other debris and become blocked, causing rainfall monitoring failure. Summary of the invention

[0003] The present application provides a blockage detection method for a rain gauge, which avoids the problem of monitoring failure of a traditional rain gauge due to blockage by comprehensive monitoring of the two variables of rainfall and rainfall intensity, and creatively realizes the comprehensive expression of rainfall conditions by the two parameters of rainfall and rainfall intensity, which is conducive to more reliable monitoring of rainfall conditions.

[0004] The present application provides a blockage detection method for a rain gauge that specifically adopts the following technical solutions: A blockage detection method applied to a rain gauge, comprising a rainfall monitoring module, a rainfall intensity monitoring module and a result analysis module; The rainfall monitoring module is used to collect rainfall monitoring data; The rain intensity monitoring module is used to collect rain intensity monitoring data; the rain intensity monitoring module includes a glass plate and an infrared transmitting unit and an infrared receiving unit arranged on one side of the glass plate, the infrared transmitting unit is used to emit parallel infrared light to the glass plate, the infrared receiving unit is used to receive the parallel infrared light reflected by the glass plate, and the other side of the glass plate is used to receive raindrops. When raindrops are received on the glass plate, the refractive index of the parallel infrared light will be changed, so that the rain intensity monitoring module determines the rain intensity monitoring data; The result analysis module is connected to the rainfall monitoring module and the rainfall intensity monitoring module, receives the rainfall monitoring data and the rainfall intensity monitoring data, and determines the device status data; The result analysis module is configured as follows: Converting the rainfall monitoring data into first monitoring data; Converting the rainfall intensity monitoring data into second monitoring data; Calculate the result of subtracting the second monitoring data from the first monitoring data as monitoring gap data; Determining the magnitude relationship between the monitoring gap data and a pre-acquired negative phase gap threshold; If the monitoring gap data is less than the negative phase gap threshold, the device status data is judged to be a blockage of the rainfall monitoring module; Otherwise, the device status data is judged to be normal.

[0005] By adopting the above technical scheme, the rainfall monitoring data and rainfall monitoring data obtained by monitoring the rainfall monitoring module and the independently designed rainfall intensity monitoring module are mutually verified, so as to determine whether the device status is blocked, so as to avoid the rainfall monitoring data being distorted or wrong and difficult to find, that is, it is helpful to timely discover the rainfall monitoring failure caused by debris, and after the rainfall monitoring failure, the rainfall intensity monitoring can also maintain a certain monitoring effect on the rainfall conditions, so that the monitoring of the rainfall conditions can be more reliably realized.

[0006] Furthermore, the wavelength range of the parallel infrared light is 800nm-900nm.

[0007] Furthermore, the result analysis module is further configured to: when the monitoring gap data is not less than the negative phase gap threshold, Determining the magnitude relationship between the monitoring gap data and a pre-acquired positive phase gap threshold; If the monitoring gap data is greater than the positive phase gap threshold, the rainfall intensity monitoring data and the rainfall amount monitoring data are judged to be abnormal data; If the monitoring gap data is not greater than the positive phase gap threshold, the monitoring result data is determined according to the rainfall intensity monitoring data and the rainfall amount monitoring data.

[0008] Further, the determining of monitoring result data according to the rainfall intensity monitoring data and the rainfall amount monitoring data includes: Assume that the rainfall monitoring data is a, the rainfall intensity monitoring data is b, and the first monitoring data is , the second monitoring data is , the monitoring result data is c, then The monitoring result data carries the timestamps of the rainfall monitoring data and the rainfall intensity monitoring data.

[0009] Furthermore, the result analysis module is further configured to: determine the stage rainfall data according to the detection result data within a preset time period; Assume that there are n monitoring result data within the preset time, and the i-th monitoring result data is , the first monitoring data corresponding to the i-th monitoring result data is The second monitoring data is , the confidence data of the i-th monitoring result data is , the stage rainfall data is C, then , .

[0010] Furthermore, the rain intensity monitoring module also includes a shell, the glass plate covers one side of the shell to form a structure enclosing the infrared transmitting unit and the infrared receiving unit, and the glass plate is used to receive raindrops upwards.

[0011] Furthermore, the rainfall monitoring module is a tipping bucket rain gauge.

[0012] In summary, this application at least has the following beneficial effects: A blockage detection method for a rain gauge is provided, which is conducive to timely detection of rainfall monitoring failure and can still ensure a certain degree of monitoring capability for rainfall conditions after rainfall monitoring failure, thereby helping to improve the reliability of rainfall condition monitoring.

[0013] It should be understood that the contents described in the Summary of the Invention are not intended to limit the key or important features of the embodiments of the present application, nor are they intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and other features, advantages and aspects of the embodiments of the present application will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, wherein: Figure 1 The schematic diagram of the rain gauge in the embodiment of the present application is shown; Figure 2 The schematic diagram of the rainfall intensity monitoring module in the embodiment of the present application is shown; Figure 3 A flow chart of a blockage detection method applied to a rain gauge in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0016] In addition, the term "and / or" in this article is only a description of the association relationship between the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0017] The present application provides a blockage detection method for a rain gauge, which is conducive to timely detection of rainfall monitoring failure, and can still ensure a certain degree of monitoring capability for rainfall conditions after rainfall monitoring failure, which is conducive to improving the reliability of rainfall monitoring.

[0018] Figure 1 The schematic diagram of the rain gauge in the embodiment of the present application is shown.

[0019] Reference Figure 1 The rain gauge includes a rainfall monitoring module 110 , a rainfall intensity monitoring module 120 and a result analysis module 130 .

[0020] The rainfall monitoring module 110 is used to collect rainfall monitoring data. The rainfall monitoring module 110 can be specifically configured as a tipping bucket rain gauge, which can collect rainfall monitoring data, and the collected rainfall monitoring data is determined by the number of tipping buckets within a unit time.

[0021] The rainfall intensity monitoring module 120 is used to collect rainfall intensity monitoring data.

[0022] Figure 2 The schematic diagram of the rainfall intensity monitoring module 120 in the embodiment of the present application is shown.

[0023] Reference Figure 2 The rain intensity monitoring module 120 includes a glass plate and an infrared emitting unit and an infrared receiving unit arranged on one side of the glass plate. The infrared emitting unit is used to emit parallel infrared light to the glass plate, and the infrared receiving unit is used to receive the parallel infrared light reflected by the glass plate. The other side of the glass plate is used to receive raindrops. When raindrops are received on the glass plate, the refractive index of the parallel infrared light will change, so that the rain intensity monitoring module 120 determines the rain intensity monitoring data.

[0024] In the embodiment of the present application, the incident angle of the parallel infrared light irradiating the glass plate is 45°. When there is no rain on the surface of the glass plate, the glass plate will totally reflect the parallel infrared light incident at 45°, that is, the infrared receiving unit will receive all the parallel infrared light emitted by the infrared transmitting unit; if there is rain on the surface of the glass plate, part of the parallel infrared light will be refracted through the glass plate, so that the parallel infrared light received by the infrared receiving unit will be reduced. Since the reflection area of ​​the parallel infrared light on the glass plate is fixed, the higher the raindrop intensity, the more raindrops fall in the reflection area or the larger the area of ​​a single raindrop. At this time, more parallel infrared light is refracted through the reflection area. Based on this principle, the rain intensity monitoring data can be determined according to the infrared light intensity received by the infrared receiving unit and the infrared light intensity emitted by the infrared transmitting unit.

[0025] In the embodiment of the present application, the wavelength range of the parallel infrared light is 800nm-900nm.

[0026] Of course, the rain intensity monitoring module 120 also includes a shell, and the glass plate covers one side of the shell to form a structure that encloses the infrared emitting unit and the infrared receiving unit, and the glass plate is used to receive raindrops upwards.

[0027] Refer to Figure 1 The result analysis module 130 is connected to the rainfall monitoring module 110 and the rainfall intensity monitoring module 120, and receives the rainfall monitoring data and the rainfall intensity monitoring data to determine the device status data.

[0028] Figure 3 A flowchart of a method for detecting a blockage in a rain gauge according to an embodiment of the present invention is shown. Figure 1 The result analysis module 130 of the rain gauge.

[0029] Reference Figure 3 , the method specifically comprises the following steps: S310: Converting the rainfall monitoring data into first monitoring data; S320: Converting the rainfall intensity monitoring data into second monitoring data; S330: Calculate the result of subtracting the second monitoring data from the first monitoring data to obtain monitoring gap data; S340: Determine the magnitude relationship between the monitoring gap data and the pre-acquired negative phase gap threshold; S350: If the monitoring gap data is less than the negative phase gap threshold, it is determined that the device status data is that the rainfall monitoring module 110 is blocked; S360: If the monitoring gap data is not less than the negative phase gap threshold, the device status data is determined to be normal.

[0030] In the above content, the purpose of converting the rainfall monitoring data into the first monitoring data and the rainfall intensity monitoring data into the second monitoring data is to unify the rain state values ​​represented by the two. For example, both the first monitoring data and the second monitoring data reflect the total volume of rainwater received by the unit area in unit time. For the rainfall monitoring data, the volume of rainwater received per unit time can be directly obtained by multiplying the number of times the bucket of the tipping rain gauge flips over per unit time by the volume of the tipping rain gauge, and then the volume is divided by the area of ​​the tipping rain gauge receiving rainwater to obtain the total volume of rainwater received per unit area in unit time. The rainfall intensity monitoring data reflects the area covered by raindrops in the reflection area. The unit volume of rainwater reflected by the unit area covered by raindrops can be preset, and the integral of the area covered by raindrops per unit time can be determined according to the integral of the rainfall intensity monitoring data per unit time, that is, the total volume of raindrops per unit time can be determined, and then the total volume of raindrops divided by the area of ​​the reflection area can be remembered to obtain the total volume of rainwater received per unit area in unit time. In this way, the unification of the dimensions of rainfall monitoring data and rainfall intensity monitoring data can be achieved. Of course, the two can also use other methods to unify the dimensions, and the specific methods will not be introduced one by one.

[0031] As described above, the negative phase difference threshold is a preset constant less than zero. When the monitoring difference data is less than the negative phase difference threshold, it means that the first monitoring data reflecting the rainfall is much smaller than the second monitoring data reflecting the rainfall intensity. At this time, it can be determined that the rainfall monitoring module 110 is blocked.

[0032] Of course, when the monitoring gap data is not less than the negative phase gap threshold, the relationship between the monitoring gap data and the pre-acquired positive phase gap threshold is determined; if the monitoring gap data is greater than the positive phase gap threshold, the rainfall intensity monitoring data and the rainfall amount monitoring data are determined to be abnormal data (the abnormality here is generally manifested as the rainfall intensity monitoring data obtained by the rainfall intensity monitoring module 120 being larger, that is, "excessive numbers", and of course it is not ruled out that the rainfall amount monitoring module 110 is slightly blocked, at which time it can be determined that the residual monitoring data and the rainfall intensity monitoring data are distorted); if the monitoring gap data is not greater than the positive phase gap threshold, the monitoring result data is determined based on the rainfall intensity monitoring data and the rainfall amount monitoring data. In an embodiment of the present application, the positive phase gap threshold is a positive real number, the negative phase gap threshold is a negative real number, and the absolute values ​​of the positive phase gap threshold and the negative phase gap threshold are equal.

[0033] In order to make the monitoring result data more reflective of the actual state of rainfall, the monitoring result data can be determined by combining the rainfall intensity monitoring data and the rainfall amount monitoring data. Specifically, the monitoring result data determined based on the rainfall intensity monitoring data and the rainfall amount monitoring data includes: assuming that the rainfall amount monitoring data is a, the rainfall intensity monitoring data is b, and the first monitoring data is , the second monitoring data is , the monitoring result data is c, then The monitoring result data carries the timestamps of the rainfall monitoring data and the rainfall intensity monitoring data.

[0034] In order to make the rainfall state in a longer period of time be determined more accurately, the result analysis module 130 can also determine the stage rainfall data according to the detection result data within the preset time length; assuming that there are n monitoring result data within the preset time length, the i-th monitoring result data is , the first monitoring data corresponding to the i-th monitoring result data is The second monitoring data is , the confidence data of the i-th monitoring result data is , the stage rainfall data is C, then , .

[0035] In summary, this application at least has the following beneficial effects: 1. Be able to promptly detect blockage of the rainfall monitoring module 110 and promptly eliminate abnormal data of the rainfall monitoring module 110; 2. The actual rainfall conditions can be comprehensively reflected by rainfall monitoring data and rainfall intensity monitoring data, so that the actual rainfall conditions can be known more accurately; 3. It can reasonably determine the rainfall in each stage based on the monitoring results data within a period of time, and more accurately reflect the rainfall conditions.

[0036] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the aforementioned disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other to form a technical solution.

Claims

1. A blockage detection method for a rain gauge, characterized in that: The rain gauge comprises a rainfall monitoring module (110), a rainfall intensity monitoring module (120) and a result analysis module (130); The rainfall monitoring module (110) is used to collect rainfall monitoring data; The rain intensity monitoring module (120) is used to collect rain intensity monitoring data; the rain intensity monitoring module (120) comprises a glass plate and an infrared emitting unit and an infrared receiving unit arranged on one side of the glass plate, the infrared emitting unit being used to emit parallel infrared light to the glass plate, the infrared receiving unit being used to receive the parallel infrared light reflected by the glass plate, the other side of the glass plate being used to receive raindrops, and when raindrops are received on the glass plate, the refractive index of the parallel infrared light will change, so that the rain intensity monitoring module (120) can determine the rain intensity monitoring data; The result analysis module (130) is connected to the rainfall monitoring module (110) and the rainfall intensity monitoring module (120), and receives the rainfall monitoring data and the rainfall intensity monitoring data to determine the device status data; The result analysis module (130) is further configured to: Converting the rainfall monitoring data into first monitoring data; Converting the rainfall intensity monitoring data into second monitoring data; Calculate the result of subtracting the second monitoring data from the first monitoring data as monitoring gap data; Determining the magnitude relationship between the monitoring gap data and a pre-acquired negative phase gap threshold; If the monitoring gap data is less than the negative phase gap threshold, the device status data is judged to be that the rainfall monitoring module (110) is blocked; Otherwise, the device status data is judged to be normal.

2. The blockage detection method for a rain gauge according to claim 1, characterized in that: The wavelength range of the parallel infrared light is 800nm-900nm.

3. The blockage detection method for a rain gauge according to claim 1, characterized in that: The result analysis module (130) is further configured to: when the monitoring gap data is not less than a negative phase gap threshold, Determining the magnitude relationship between the monitoring gap data and a pre-acquired positive phase gap threshold; If the monitoring gap data is greater than the positive phase gap threshold, the rainfall intensity monitoring data and the rainfall amount monitoring data are judged to be abnormal data; If the monitoring gap data is not greater than the positive phase gap threshold, the monitoring result data is determined according to the rainfall intensity monitoring data and the rainfall amount monitoring data.

4. The blockage detection method for a rain gauge according to claim 3, characterized in that: Determining the monitoring result data according to the rainfall intensity monitoring data and the rainfall amount monitoring data includes: Assume that the rainfall monitoring data is a, the rainfall intensity monitoring data is b, and the first monitoring data is , the second monitoring data is , the monitoring result data is c, then The monitoring result data carries the timestamps of the rainfall monitoring data and the rainfall intensity monitoring data.

5. The method according to claim 4, characterized in that The result analysis module (130) is further configured to: determine stage rainfall data according to the detection result data within a preset time period; Assume that there are n monitoring result data within the preset time, and the i-th monitoring result data is , the first monitoring data corresponding to the i-th monitoring result data is The second monitoring data is , the confidence data of the i-th monitoring result data is , the stage rainfall data is C, then , .

6. The blockage detection method for a rain gauge according to any one of claims 2 to 5, characterized in that: The rain intensity monitoring module (120) also includes a shell, the glass plate covers one side of the shell to form a structure enclosing the infrared emitting unit and the infrared receiving unit, and the glass plate is used to receive raindrops upwards.

7. The blockage detection method for a rain gauge according to any one of claims 1 to 6, characterized in that: The rainfall monitoring module (110) is a tipping bucket rain gauge.

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