A remote observation method based on automatic frozen soil observation instrument

Abstract

The invention discloses a remote observation method based on a frozen soil automatic observation instrument, comprising the following steps: receiving minute acquisition values ​​and performing validity and data quality control analysis on the minute acquisition values, obtaining minute qualified data after analysis, and using the minute qualified data for later hourly analysis and processing to obtain minute frozen soil depth and layer; recording the lower limit maximum value in the minute qualified data of the current layer within each hour as the hourly frozen soil layer lower limit value, the corresponding upper limit value as the hourly frozen soil layer upper limit value, and the lower limit maximum value occurrence time as the hourly frozen soil layer appearance time, and performing quality control analysis on the hourly frozen soil layer lower limit value, the hourly frozen soil layer upper limit value, and the hourly frozen soil layer appearance time, and recording the qualified hourly data as the hourly deepest frozen soil layer upper and lower limit values ​​and appearance time. The invention can measure the frozen soil area in real time, and ensure accurate measurement of the frozen soil changes of meteorological elements in the frozen soil area, thereby reducing the difficulty of maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of frozen soil measurement, and in particular to a remote observation method based on an automatic frozen soil observation instrument. Background Art

[0002] Frozen soil is the only meteorological observation element that contains upper and lower limits and an indefinite number of layers. In meteorological observations at home and abroad, the traditional method of measuring the depth of frozen soil is to place a plastic tube filled with local groundwater or tap water and sealed at both ends vertically in a copper tube buried in the soil, and judge the depth of frozen soil based on the freezing of water. This method actually observes the position of ground temperature at 0°C and cannot accurately measure the position of frozen soil. Due to the differences in soil texture, composition and concentration of aqueous solutions and external conditions such as pressure, the freezing (freezing point) temperature is not the same. Therefore, this method is not scientific for observing the depth of frozen soil. Moreover, when the frozen soil layer is deep, the observation is inconvenient, the workload is large, and it is time-consuming and labor-intensive. In addition, the density of measurement data is not enough, and the depth of frozen soil and its development and changes cannot be monitored in real time. Satellite remote sensing can also monitor frozen soil to a certain extent, but it is only suitable for large-scale monitoring and cannot carry out refined monitoring of the depth of frozen soil. Summary of the invention

[0003] In order to solve the above technical problems, the present invention proposes a remote observation method based on an automatic frozen soil observation instrument.

[0004] In order to achieve the above object, the technical solution of the present invention is as follows:

[0005] A remote observation method based on a frozen soil automatic observation instrument comprises the following steps:

[0006] Receive minute-by-minute data and perform validity and data quality control analysis on the minute-by-minute data. After the analysis, obtain minute-by-minute qualified data. The minute-by-minute qualified data is used for subsequent hourly analysis and processing to obtain minute-by-minute frozen soil depth and layer.

[0007] The maximum lower limit value of the qualified minute data of the current layer within each hour is recorded as the lower limit value of the hourly frozen soil layer, the corresponding upper limit value is recorded as the upper limit value of the hourly frozen soil layer, the time of occurrence of the maximum lower limit is recorded as the hourly frozen soil layer appearance time, and quality control analysis is performed on the lower limit value of the hourly frozen soil layer, the upper limit value of the hourly frozen soil layer, and the hourly frozen soil layer appearance time. The qualified hourly data are recorded as the upper and lower limit values ​​of the hourly deepest frozen soil layer and the appearance time.

[0008] Preferably, the validity analysis of the minute collection value includes the following steps: comparing the minute sampling value with a preset climate identification threshold; if it is within the range, it is a valid value for the frozen soil minute collection; if it is beyond the range, it is an invalid value and is not used for other calculations.

[0009] Preferably, the data quality control analysis of the minute collection values ​​comprises the following steps:

[0010] The current minute collection value of each collection unit is compared layer by layer with the corresponding layer value of the previous interval minute collection value. If the change in the minute sampling value is within the preset correct change range, the current minute value is the minute qualified data; if it is within the preset suspicious change range, the current minute collection value cannot be used to calculate the upper and lower limits of the hourly deepest frozen soil layer, but it is still used for the next data quality control analysis, that is, comparing the next interval minute collection value with the suspicious value; if it is within the preset incorrect change range, the current minute collection value cannot be used to calculate the upper and lower limits of the hourly deepest frozen soil layer.

[0011] Preferably, the data quality control analysis of the minute collection value also includes the following steps: when the corresponding level increases, if the current minute collection value of the collection unit meets the requirements within the upper and lower limits of the meteorological variable change, the current minute value is the minute qualified data.

[0012] Preferably, the variation of the minute sampling value is calculated using the vertical and horizontal extreme value set method, and the formula is: In the formula, For the Amount of change, and The horizontal initial minute state The level value corresponds to the current minute status Level values, For the vertical The amount of change in depth of each layer, when the lateral change melts or freezes away, Treat as 0cm.

[0013] Preferably, if the lower-limit maximum values ​​of the qualified minute data of the current layer within each hour are the same, the hourly frozen soil layer appearance time adopts the most recent appearance time.

[0014] Preferably, the collection interval of the minute sampling value is no greater than 1 minute.

[0015] A remote observation system based on a frozen soil automatic observation instrument comprises: a frozen soil automatic observation instrument, an industrial control computer and a database, one end of each of the frozen soil automatic observation instruments is vertically buried in the ground and is connected to the industrial control computer for communication, and the industrial control computer is connected to the database, wherein:

[0016] The automatic frozen soil observation instrument includes: a frozen soil sensor, a collector, a power supply unit and a wireless communication unit, among which:

[0017] A power supply unit is connected to the frozen soil sensor and the collector respectively to provide power to the frozen soil sensor and the collector respectively;

[0018] The frozen soil sensor is connected to the collector via a CAN bus and is used to collect minute collection values ​​of the frozen soil and transmit the minute collection values ​​to the collector;

[0019] The collector is connected to the industrial control computer through a wireless communication unit, and is used to receive the minute collection value of the frozen soil collected by the frozen soil sensor, and upload the received data to the industrial control computer.

[0020] The industrial control computer is used to receive and process the data sent by the collector, make corresponding analysis and processing, obtain the upper and lower limits of the deepest frozen soil layer and the time of occurrence, and upload the analysis results into the meteorological BUFF format data to the database;

[0021] Database, used to store data.

[0022] Preferably, the frozen soil sensor comprises a plurality of equally spaced and vertically distributed measuring units, and the measuring units are frost resistance sensors or temperature measuring sensors.

[0023] Preferably, the wireless communication unit adopts an RS232 module or an RS485 module.

[0024] Based on the above technical solution, the beneficial effects of the present invention are:

[0025] 1) It can realize long-term automatic monitoring of different frozen soil depths, ensure accurate measurement of frozen soil changes of meteorological elements in frozen soil areas, and reduce the difficulty of maintenance;

[0026] 2) Conduct real-time measurements of frozen soil areas, understand the detailed changes in meteorological elements and frozen soil in frozen soil areas, and conduct error analysis on the data during the measurement process, which can improve the accuracy and authenticity of frozen soil measurements of meteorological elements in frozen soil areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0028] Figure 1 : A flow chart of a remote observation method based on an automatic frozen soil observation instrument of the present invention;

[0029] Figure 2 : A schematic diagram of comparing two adjacent groups of data in a remote observation method based on an automatic frozen soil observation instrument of the present invention;

[0030] Figure 3 : The principle block diagram of a remote observation based on the automatic frozen soil observation instrument of the present invention,

[0031] In the figure, each reference numeral is:

[0032] 1-frozen soil automatic observation instrument, 11-frozen soil sensor, 12-collector, 13-power supply unit, 14-wireless communication unit, 2-industrial control computer, 3-database. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Embodiment 1

[0034] like Figure 1 , 2 As shown, a remote observation method based on a frozen soil automatic observation instrument comprises the following steps:

[0035] After the frozen soil automatic observation instrument 1 self-checks that the equipment is normal every minute, it issues a collection instruction, and the frozen soil sensor 11 receives the collection command, collects the frozen soil and sends the minute collection value to the collector 12;

[0036] The collector 12 receives the minute collection value of each measuring unit in the frozen soil sensor 11 within the collection interval and sends the minute collection value to the industrial control computer 2;

[0037] The industrial control computer 2 receives the minute collection value and performs validity and data quality control analysis on the minute collection value, and obtains the minute qualified data after analysis. The minute qualified data is used for subsequent hourly analysis and processing, and the minute frozen soil depth and layer are calculated according to the collection algorithm;

[0038] The maximum lower limit value of the qualified minute data of the current layer within each hour is recorded as the lower limit value of the hourly frozen soil layer, the corresponding upper limit value is recorded as the upper limit value of the hourly frozen soil layer, and the time of occurrence of the maximum lower limit is recorded as the appearance time of the hourly frozen soil layer (when the maximum lower limit values ​​of the qualified minute data of the current layer within each hour are the same, the most recent time is used as the appearance time of the hourly frozen soil layer), and quality control analysis is performed on the lower limit value of the hourly frozen soil layer, the upper limit value of the hourly frozen soil layer, and the appearance time of the hourly frozen soil layer, and the qualified hourly data are recorded as the upper and lower limit values ​​of the hourly deepest frozen soil layer and the appearance time.

[0039] Furthermore, the validity analysis of the minute collection value is carried out: the minute sampling value is compared with the preset climate identification threshold. If it does not exceed the range, it is a valid value of the frozen soil minute collection; if it exceeds the range, it is an invalid value and is not used for other calculations.

[0040] Furthermore, data quality control analysis is performed on the minute-collected values: the vertical and horizontal extreme value set method is used to calculate the change in the minute sampling values. According to the characteristics of frozen soil itself, the change in the minute data of automatic observation of frozen soil includes two situations: horizontal minute corresponding level change and vertical self-level change. The horizontal corresponding level change refers to the frozen soil data collected two minutes before and after, and the upper and lower limits of each layer of frozen soil change accordingly; the vertical self-level change refers to the frozen soil data collected in two adjacent minutes, corresponding to the change in the depth of its own level. The maximum value of the vertical and horizontal changes is used as the change value of the automatic observation minute data of frozen soil, including the following steps:

[0041] The current minute collection value of each collection unit is compared layer by layer with the corresponding layer value of the previous interval minute collection value. If the change in the minute sampling value is within the preset correct change range, it is marked as "correct" and the current minute value is the qualified minute data; if it is within the preset suspicious change range, it is marked as "suspicious" and the current minute collection value cannot be used to calculate the upper and lower limits of the hourly deepest frozen soil layer, but it is still used for the next data quality control analysis, that is, the next interval minute collection value is compared with the suspicious value; if it is within the preset wrong change range, it is marked as "wrong" and the current minute collection value cannot be used to calculate the upper and lower limits of the hourly deepest frozen soil layer;

[0042] When the number of corresponding levels increases, if the current minute collection value of the collection unit meets the requirements within the upper and lower limits of the meteorological variable change, the current minute value is the minute qualified data.

[0043] Among them, the vertical and horizontal extreme value set method calculates the change in minute sampling values ​​using the following formula: In the formula, For the Amount of change, and The horizontal initial minute state The level value corresponds to the current minute status Level values, For the vertical The amount of change in depth of each layer, when the lateral change melts or freezes away, Treat as 0cm.

[0044] According to the above formula, if Figure 2As shown, the left side is the initial minute state, and the right side is the current minute state. The first layer of 38-43cm melted completely after one minute of change, that is, the longitudinal melting change was 5cm, and there was no comparative reference value in the horizontal direction, so it was treated as 0cm; the initial second and third layers were frozen and merged into the first layer of the current minute one minute later, and the vertical 26-29cm layer was frozen and disappeared, so 3cm was taken for both, and the horizontal upper limit changed from 22cm to 23cm, melting 1cm, and the lower limit 33cm changed to 34cm, freezing 1cm. When the data change of the same layer of frozen soil includes both horizontal and vertical changes, the larger change value is taken as the calculation value of the change range, so the vertical change of 3cm is taken when calculating the change amount; the initial fourth layer changes to the current second layer status, the upper limit corresponding to no change is 0cm, and the lower limit is 4cm frozen, that is, both the horizontal and vertical changes are 4cm; the initial fifth layer becomes the current third layer, and the state does not change, so the corresponding change amount is 0cm.

[0045] Furthermore, the quality control analysis of the hourly deepest frozen soil layer appearance time is carried out: the hourly deepest frozen soil layer appearance time should be within the range from the current hour to the current minute. If it does not exceed the range, it is correct; if it exceeds the range, it is an error value and is no longer used to calculate the hourly deepest frozen soil layer appearance time.

[0046] Furthermore, the quality control analysis of the upper and lower limits of the hourly deepest permafrost layer is carried out: verify whether the upper and lower limits of the hourly deepest permafrost layer are within the upper and lower limits of the preset meteorological variable changes, and correspond to the upper and lower limits of the permafrost layer. If there is a value, it is correct; otherwise, it is an error value and cannot be used to calculate the upper and lower limits of the hourly deepest permafrost layer.

[0047] like Figure 3 As shown, a remote observation system based on a frozen soil automatic observation instrument comprises: a frozen soil automatic observation instrument 1, an industrial control computer 2 and a database 3. The frozen soil automatic observation instruments 1 are buried according to the area of ​​the monitored area, wherein the distance between each two of the frozen soil automatic observation instruments 1 is set between 18-22 km, one end of each of the multiple frozen soil automatic observation instruments 1 is vertically buried in the ground, and each of them is connected to the industrial control computer 2 for communication, and the industrial control computer 2 is connected to the database 3, wherein,

[0048] The frozen soil automatic observation instrument 1 includes: a frozen soil sensor 11, a collector 12, a power supply unit 13 and a wireless communication unit 14, wherein:

[0049] The power supply unit 13 is connected to the frozen soil sensor 11 and the collector 12 respectively, and provides power to the frozen soil sensor 11 and the collector 12 respectively;

[0050] The frozen soil sensor 11 is connected to the collector 12 via a CAN bus, and is used to collect minute collection values ​​of the frozen soil and transmit the minute collection values ​​to the collector 12;

[0051] The collector 12 is connected to the industrial control computer 2 through the wireless communication unit 14, and is used to receive the minute collection value of the frozen soil collected by the frozen soil sensor 11, and upload the received data to the industrial control computer 2.

[0052] The industrial control computer 2 is used to receive and process the data sent by the collector 12, make corresponding analysis and processing, obtain the upper and lower limits of the deepest frozen soil layer and the occurrence time of the hour, and upload the analysis results into the meteorological BUFF format data to the database 3;

[0053] Database 3 is used to store data.

[0054] Furthermore, the frozen soil sensor 11 includes a plurality of equally spaced and vertically distributed measuring units, and the measuring units are frost resistance sensors or temperature measuring sensors.

[0055] Furthermore, the wireless communication unit 14 adopts an RS232 module or an RS485 module.

[0056] The above is only a preferred implementation of a remote observation method based on a frozen soil automatic observation instrument disclosed by the present invention, and is not intended to limit the protection scope of the embodiments of this specification. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of this specification shall be included in the protection scope of the embodiments of this specification.

[0057] The systems, devices, modules or units described in the above embodiments may be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0058] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0059] Each embodiment in the embodiments of this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

Claims

1. A remote observation method based on an automatic frozen soil observation instrument, characterized in that: The steps include: Receive minute-by-minute data and perform validity and data quality control analysis on the minute-by-minute data. After the analysis, obtain minute-by-minute qualified data. The minute-by-minute qualified data is used for subsequent hourly analysis and processing to obtain minute-by-minute frozen soil depth and layer. The lower limit maximum value of the qualified minute data of the current layer within each hour is recorded as the lower limit value of the hourly frozen soil layer, the corresponding upper limit value is recorded as the upper limit value of the hourly frozen soil layer, and the occurrence time of the lower limit maximum value is recorded as the appearance time of the hourly frozen soil layer. The lower limit value of the hourly frozen soil layer, the upper limit value of the hourly frozen soil layer, and the appearance time of the hourly frozen soil layer are subjected to quality control analysis. The qualified hourly data are recorded as the upper and lower limit values ​​of the hourly deepest frozen soil layer and the appearance time, among which, The validity analysis of the minute-collected value includes the following steps: comparing the minute-collected value with the preset climate identification threshold value. If it is within the range, it is a valid value of the frozen soil minute-collected value; if it is beyond the range, it is an invalid value and is not used for other calculations; The data quality control analysis of the minute collection value includes the following steps: comparing the current minute collection value of each collection unit with the corresponding layer value of the previous interval minute collection value layer by layer; if the change of the minute sampling value is within the preset correct change range, the current minute value is the minute qualified data; if it is within the preset suspicious change range, the current minute collection value cannot be used to calculate the upper and lower limits of the hourly deepest frozen soil layer, but is still used for the next data quality control analysis, that is, comparing the next interval minute collection value with the suspicious value; if it is within the preset wrong change range, the current minute collection value cannot be used to calculate the upper and lower limits of the hourly deepest frozen soil layer; when the corresponding layers increase, if the current minute collection value of the collection unit meets the requirements within the upper and lower limits of the meteorological variable change, the current minute value is the minute qualified data, and the change of the minute sampling value is calculated using the vertical and horizontal extreme value set method, and the formula is: In the formula, For the Amount of change, and The horizontal initial minute state The level value corresponds to the current minute status Level values, For the vertical The amount of change in depth of each layer, when the lateral change melts or freezes away, Treat as 0cm.

2. A remote observation method based on a frozen soil automatic observation instrument according to claim 1, characterized in that: If the lower-limit maximum values ​​of the qualified minute data of the current layer are the same within each hour, the hourly frozen ground appearance time shall be the most recent time.

3. The remote observation method based on the frozen soil automatic observation instrument according to claim 1 is characterized in that: The collection interval of the minute collection value is no greater than 1 minute.

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