CN109696536B - Water quality monitoring sampling probe - Google Patents
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Abstract
The invention belongs to the technical field of environmental monitoring, and discloses a water quality monitoring sampling probe, which comprises a main control unit, and a water quality parameter probe, a water sample extraction unit, a wireless communication unit and a water conductivity value detection unit which are in signal connection with the main control unit; the water quality parameter probe is used for detecting variable water quality parameters, and the water sample extraction unit extracts a water body; the main control unit controls the water quality parameter probe, the water sample extraction unit and the water inlet and outlet detection unit to act according to a preset program or an external instruction, receives feedback data and sends the feedback data to an external control mechanism; the water inlet and outlet detection unit carries out water inlet detection according to the current water guide value detected by the water guide value detection unit; the wireless communication unit realizes communication with an external mechanism; the probe provided by the invention can automatically detect water entering, automatically control the start and the end of water sample collection, and can measure a plurality of variable parameters and non-variable parameters of the same water body at one time; and by realizing effective correction of the measurement of the multi-coupling parameter; the method has the characteristics of low energy consumption, high efficiency and high reliability.
Description
Technical Field
The invention belongs to the technical field of environmental monitoring, and particularly relates to a water quality monitoring sampling probe.
Background
Environmental monitoring often involves analyzing the water quality of a body of water; the water quality parameters comprise variable parameters and non-variable parameters; the values of the variable parameters such as the sample temperature, the dissolved oxygen concentration, the conductivity and the like are changed rapidly after the water quality sample is separated from the water body, so that the measured parameter values deviate from the real values remarkably when the measurement is carried out outside the water body. The non-variable parameters such as chlorophyll, total nitrogen content, ion concentration and the like have no or little change after the sample is separated from the water body, and the sample separated from the water body can be used for effective measurement. The existing water quality probe related technical scheme for monitoring water quality data can not realize one-time measurement of variable parameters and non-variable parameters of the same water body.
In the aspect of water inlet and outlet detection of a water quality probe, the existing water quality probe cannot realize automatic water inlet and outlet detection and cannot realize automatic control of the start and the end of water sample collection. For example, the mechanical assembly structure water quality probe without electric and electronic parts needs manual judgment of the beginning and the end of probe water inlet, water outlet and manual operation control of water sample collection, and can not realize complete automatic water sample collection. The existing probe which is provided with electric and electronic parts and supplies power to the outside through a wire cable can not realize automatic water inlet and outlet detection, and the water inlet and outlet of the probe need to be judged manually. In the aspect of the starting and ending control of water sample collection, although the starting and ending of the water sample collection can be controlled based on power-on and power-off, semi-automatic control is performed, water seepage, water leakage and high corrosion risks are caused by the existence of the electric wire and the connector in the water, and the service lives of the water quality probe and the pipeline are shortened.
However, a coupling relationship exists between partial water quality parameters, for example, water quality conductivity is generally measured by using 'resistance value-conductivity', but since a 'temperature-resistance value' relationship is implied, a true conductivity value cannot be obtained only by using a 'resistance value-conductivity' corresponding relationship. The existing probe for real-time water quality monitoring cannot effectively correct multi-coupling parameter measurement and cannot obtain an accurate true measurement value because the coupling relation among multiple parameters is not considered or the probe is adjusted only by an approximate correction method based on a hardware circuit.
Disclosure of Invention
Aiming at the defects or the improvement requirements of the prior art, the invention provides a water quality monitoring sampling probe, and aims to realize full-automatic water quality sampling monitoring.
In order to achieve the above object, according to one aspect of the present invention, there is provided a water quality monitoring sampling probe, comprising a water quality parameter probe, a water sample extraction unit, a main control unit, a wireless communication unit, a water conductivity detection unit, and a water pipe connector; the main control unit is in signal connection with the water quality parameter probe, the water sample extraction unit, the wireless communication unit and the water inlet and outlet detection unit;
the water quality parameter probe is used for detecting variable water quality parameters, and the water sample extraction unit is used for extracting a water body to be detected; the main control unit is used for controlling the opening, closing and data transmission of the water quality parameter probe, the water sample extraction unit and the water inlet and outlet detection unit according to an external instruction received by the wireless communication unit or a preset program, receiving data fed back by the water quality parameter probe, the water sample extraction unit and the water inlet and outlet detection unit and sending the data to an external control mechanism through the wireless communication unit;
the water guide value detection unit is used for detecting the current water guide value; the water inlet and outlet detection unit is used for carrying out water inlet detection and water outlet detection according to the water guide value; the wireless communication unit realizes communication with an external control mechanism;
the water pipe connector is used for connecting an external water pipe and conveying the extracted water quality sample to the outside of the water body.
Preferably, the water quality parameter measuring probe of the water quality monitoring sampling probe comprises a composite probe, a turbidity probe and/or a dissolved oxygen probe;
the composite probe is used for detecting the conductivity, the pH value and/or the temperature value of the water body in the water body; the turbidity probe is used for detecting the original value of the turbidity parameter of the water body in the water body; the dissolved oxygen probe is used for detecting the original value of the dissolved oxygen parameter of the water body in the water body.
Preferably, the main control unit of the water quality monitoring sampling probe is further configured to perform multi-coupling parameter correction on the parameter original value detected by the water quality parameter probe.
Preferably, the main control unit of the water quality monitoring and sampling probe performs auxiliary detection of water inlet and outlet according to one or more of measured values of conductivity, pH value, turbidity and dissolved oxygen collected by the water quality parameter probe.
Preferably, the water conductivity value detecting unit of the water quality monitoring and sampling probe comprises at least two metal contacts, and the water quality probe is detected to be located in the water body or outside the water body according to the change of the water conductivity value between the two metal contacts.
Preferably, the water quality monitoring and sampling probe further comprises a shell for accommodating, protecting and bearing various working components of the water quality probe.
Preferably, the water quality monitoring and sampling probe further comprises a filter cover for intercepting solid impurities in the water to be detected so as to prevent the water quality probe from being blocked and interfere measurement, and for protecting a sensing part of the probe.
Preferably, above-mentioned water quality monitoring sampling probe still includes the energy storage unit, and the energy storage unit is water quality parameter probe, water sample extraction unit, main control unit, wireless communication unit and water guide value detecting element power supply for water quality monitoring sampling probe still can normally work under the condition of no external power supply.
In order to achieve the object, according to another aspect of the present invention, there is provided a water quality monitoring sampling probe water inlet detection method, specifically comprising:
real-time sensing value v of any water quality parameter; obtaining an inflow detection judgment result according to the real-time sensing value by adopting a single parameter model;
wherein, the single parameter model is as follows:
for the case where v and s satisfy "non-negative correlation", the relationship of v, Th, Tl, s is:
for the case where v and s satisfy "non-positive correlation", the relationship of v, Th, Tl, s is:
wherein v is a real-time sensing value, ThFor high decision threshold, TlA low judgment threshold is set, s is a judgment result, s is 0 and represents 'not in water', and s is 1 and represents 'in water'; different sensing parameters with different high decision threshold ThSum low decision threshold Tl。
In order to achieve the purpose of the invention, according to another aspect of the invention, a water quality monitoring sampling probe water inlet detection method is provided, firstly, whether the probe enters water is respectively judged according to real-time sensing values of water quality parameters, and a plurality of mutually independent binarization judgment results corresponding to the water quality parameters are obtained; and then fusing the independent judgment results, and judging again according to the fusion result to obtain a binarization judgment result finally indicating whether the water quality monitoring sampling probe is in water.
Through the dual judgment of combining a plurality of water quality parameters and sensing values in real time, on one hand, the final binarization judgment result does not completely depend on the accuracy of a certain sensor, and the accidental fault or small-range drift of the certain sensor such as a composite probe, a turbidity probe and/or a dissolved oxygen probe does not influence the final detection result; on the other hand, the influence of the unreasonable first re-judgment method of a certain sensor on the final detection result can be eliminated in the double judgment process, and the accuracy of the final water inlet detection result is improved; and the decision process is suitably implemented on an embedded processor.
In order to achieve the object, according to another aspect of the present invention, there is provided a water quality monitoring sampling probe water inlet detection method, specifically comprising:
obtaining s by utilizing a multi-parameter model for a plurality of water quality parameter real-time sensing valuestotalAnd adopting the following model to judge water entry:
wherein the multi-parameter model
Wherein s is1、s2、s3、…、si、…、snThe judgment result s of whether the probe is in water or not is obtained according to the real-time sensing value of each water quality parameter by adopting a single parameter modeltotalIs a total decision value; t isthFor a fusion value high decision threshold, TtlAnd determining the threshold as the fusion value is low.
In order to achieve the object, according to another aspect of the present invention, an intelligent start-stop control method for a water quality extraction unit is provided, which specifically comprises the following steps:
(a) under the normal state of wireless communication, the main control unit controls the switch of the water sample extraction unit according to a control command sent by an external control mechanism and received by the wireless communication unit;
(b) under the condition that the wireless communication state is abnormal, or the wireless communication is disconnected, or the wireless communication does not exist, the main control unit determines whether the water quality detection probe enters water according to the detection value of the water conductivity value detection unit, and controls the water sample extraction unit to be started in a delayed mode according to a preset program, so that the automatic water sample collection under the non-communication state is realized.
In order to achieve the object of the present invention, according to another aspect of the present invention, there is provided a data transmission method for a water quality monitoring sampling probe, specifically comprising:
(a) under the normal state of wireless communication, the main control unit sends the parameter detection value to an external control mechanism through the wireless communication unit;
(b) and under the condition that the wireless communication state is abnormal, or the wireless communication is disconnected, or the wireless communication does not exist, the main control unit stores the parameter detection value, and automatically transmits the stored parameter detection value to an external control mechanism after the wireless communication is recovered.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
(1) according to the water quality monitoring sampling probe provided by the invention, the multi-parameter, high-precision, low-energy consumption and high-reliability monitoring and sampling operation can be automatically realized according to an external mechanism instruction or an internal preset program only by placing the water quality probe into a water body, so that the automatic water quality monitoring sampling is realized; when the water quality parameter probe detects the variable parameters of water quality in the water body, the water sample extracted by the water sample extraction unit can be used for detecting the non-variable parameters in a laboratory, and a plurality of variable parameters and non-variable parameters of the same water body can be measured at one time, so that the water quality monitoring efficiency is improved, and the monitoring cost is reduced.
(2) The water quality monitoring sampling probe provided by the invention realizes automatic water inlet and outlet detection, has high detection accuracy, and can control the start and stop of the water sample extraction unit according to an external mechanism instruction or an internal preset program, thereby controlling the automatic start and stop of water sample collection, reducing energy consumption, improving reliability and prolonging service life.
(3) According to the water quality monitoring sampling probe provided by the invention, in the preferred scheme, the measurement of the multi-coupling parameter is effectively corrected, so that the water quality parameter is effectively measured.
(4) The water quality monitoring sampling probe provided by the invention also has the characteristics of light weight and integration, and is suitable for various occasions such as fixed-point measurement, multi-point mobile measurement, small and medium unmanned ship mounting, small and medium unmanned aerial vehicle mounting and the like.
(5) The water quality monitoring sampling probe provided by the invention has the advantages that the data transmission method provided by the optimal scheme enables the wireless data link transmission to have strong adaptability, and is suitable for application scenes with wireless communication environments and without wireless communication environments.
Drawings
FIG. 1 is a schematic diagram of a water quality monitoring sampling probe according to an embodiment of the present invention;
FIG. 2 is a second schematic diagram of a water quality monitoring sampling probe according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a typical work flow of the water quality monitoring sampling probe provided by the embodiment.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein: the device comprises a 1-composite probe, a 2-turbidity probe, a 3-dissolved oxygen probe, a 4-water sample extraction unit, a 5-shell, a 6-filter cover, an 8-wireless communication unit, a 9-water pipe connector and an 11-water conductivity detection unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1-2, the water quality monitoring sampling probe provided by the embodiment comprises a water quality parameter probe, a water sample extraction unit 4, a main control unit, a wireless communication unit 8, a water conductivity value detection unit 11 and a water pipe connector 9; the main control unit is in signal connection with the water quality parameter probe, the water sample extraction unit, the wireless communication unit and the water inlet and outlet detection unit;
the water quality parameter probe is used for detecting variable water quality parameters, and the water sample extraction unit is used for extracting a water body to be detected; the main control unit is used for controlling the opening, closing and data transmission of the water quality parameter probe, the water sample extraction unit and the water inlet and outlet detection unit according to an external instruction received by the wireless communication unit or a preset program, receiving data fed back by the water quality parameter probe, the water sample extraction unit and the water inlet and outlet detection unit and sending the data to an external control mechanism through the wireless communication unit;
the wireless communication unit realizes communication with an external control mechanism and realizes bidirectional transmission of control information and monitoring information with the outside; under the condition that wireless communication fails due to strong interference and deep water depth, when a water sample acquisition instruction sent from the outside cannot be received, the main control unit determines whether the water quality detection probe enters water according to the detection value of the water conductivity value detection unit, and controls the water sample extraction unit and the water quality parameter probe to be started in a delayed mode according to a preset program, so that automatic water sample acquisition and water quality parameter detection in a non-communication state are realized; and the main control unit stores the parameter detection value, and automatically sends the stored parameter detection value to an external control mechanism after communication is recovered.
The water guide value detection unit is used for detecting the current water guide value; the water inlet and outlet detection unit is used for carrying out water inlet detection and water outlet detection according to the water guide value; the water pipe connector is a component with composite function, is a solid connecting piece between the water quality detection sampling probe and the outside, is used for detecting non-variable parameters of water quality samples output and collected from the outside of a water body, and is also used for connecting an external water pipe to suspend the water quality detection sampling probe so as to put in and take back the water quality samples.
Another embodiment provides a water quality monitoring sampling probe preferably still includes the energy storage unit, and the energy storage unit is water quality parameter probe, water sample extraction unit, main control unit, wireless communication unit and water guide value detecting element power supply for water quality monitoring sampling probe still can normally work under the condition of no external power supply. In another preferred embodiment, the water quality probe further comprises a housing 5 for accommodating, protecting and carrying the components of the water quality probe. In another preferred embodiment, the device further comprises a filter cover 6 for intercepting solid impurities in the water body to be detected so as to prevent the water quality probe from being blocked and interfering measurement, and for protecting a sensing part of the probe.
In an embodiment, the water conductivity detection unit 11 includes at least two metal contacts, and measures impedance (i.e. water conductivity) between the metal contacts based on an "alternating voltage-current" relationship; and judging whether the water quality probe is in the water body or out of the water body according to the water conductivity value.
In the embodiment, the water quality parameter probe comprises a composite probe 1, a turbidity probe 2 and a dissolved oxygen probe 3; the composite probe is used as a composite functional component and is used for detecting the conductivity, pH value and/or temperature value of the water body in the water body; the original values of the conductivity and the pH value are also used for assisting in water inlet and outlet detection.
The turbidity probe is used as a composite functional component and is used for detecting the original value of the turbidity parameter of the water body, and the acquired original value of the turbidity is also used for assisting in detecting the water inlet and the water outlet;
the dissolved oxygen probe is also a composite functional component and is used for detecting the original value of the dissolved oxygen parameter of the water body and assisting in detecting water inlet and water outlet. In the invention, the water quality parameter probe is not limited to the types listed in the examples, and any one or more sensor probes for detecting the water quality parameter can be included, all of which belong to the technical scheme of the invention.
Under the condition that the water conductivity detection unit fails, the embodiment also provides another water inlet detection method of the water quality monitoring sampling probe with single parameter, which comprises the following steps:
(1) collecting any one of conductivity, pH value, turbidity, dissolved oxygen concentration or water conductivity value as a real-time sensing value v;
(2) obtaining an inflow detection judgment result according to the real-time sensing value by adopting a single parameter model;
wherein, the single parameter model is as follows:
for the case where v and s satisfy "non-negative correlation", the relationship of v, Th, Tl, s is:
wherein v is a real-time sensing value, ThFor high decision threshold, TlA low judgment threshold is set, s is a judgment result, s is 0 and represents 'not in water', and s is 1 and represents 'in water'; different sensing parameters with different high decision threshold ThSum low decision threshold Tl；
For the case where v and s satisfy "non-positive correlation", the relationship of v, Th, Tl, s is:
wherein v is real-time sensingValue, ThFor high decision threshold, TlA low judgment threshold is set, s is a judgment result, s is 0 and represents 'not in water', and s is 1 and represents 'in water'; different sensing parameters with different high decision threshold ThSum low decision threshold Tl。
"non-positive correlation" and "non-negative correlation" refer to a relationship between the characteristics of the sensor itself and a predefined determination result. The following illustrates "non-negative correlation": for example, when water conductivity is used for water inflow detection, it is predefined that "0" represents "not in water" and "1" represents "in water"; the sensor for detecting the water conductivity value has the characteristics that the measured value is the minimum when the sensor is not in water (indicated by 0), and the measured value is higher when the sensor is in water because the conductivity of water is higher; the binaryzation parameter used for describing whether the sensor is in water and the measured value of the water guide sensor show that the measured value is increased, and the binaryzation parameter is not reduced; the measured value decreases, and the binarization parameter does not increase.
In a preferred embodiment, the high decision threshold ThLow decision threshold TlDetermining according to the real-time sensing value; respectively obtaining the average value of the real-time sensing value of a certain parameter with a value under the two states of 'in water' and 'out of water', wherein the larger value is recorded as Vmax, and the smaller value is recorded as Vmin;
then Th＝(2*Vmax+Vmin)/3；Tl＝(Vmax+2*Vmin)/3。
The embodiment also provides another water quality monitoring and sampling probe water-entering detection method with multiple parameters, which comprises the following steps:
obtaining s by utilizing a multi-parameter model for a plurality of water quality parameter real-time sensing valuestotalAnd adopting the following model to judge water entry:
wherein the multi-parameter model
Wherein s is1、s2、s3、…、si、…、snAdopting a single parameter model judgment result for each water quality parameter real-time sensing value, and taking the value as 0 or 1; alpha is alphaiThe weight of the ith water quality parameter is the weight corresponding to the ith sensing probe, such as a composite probe or a turbidity probe; stotalIs a total decision value; t isthFor a fusion value high decision threshold, TtlAnd determining the threshold as the fusion value is low.
In the present process, stotalIs not binarized; high decision threshold ThLow decision threshold TlDetermining according to the real-time sensing value of the water quality parameter; respectively acquiring the binary judgment results s of each sensor in two states of 'in water' and 'out of water', and respectively calculating the corresponding stotalWherein the larger value is denoted as Stmax and the smaller value is denoted as Stmin; then Tth＝(2*Stmax+Stmin)/3；Ttl＝(Stmax+2*Stmin)/3。
Firstly, respectively judging whether the probe enters water or not by adopting a single parameter model according to the real-time sensing value of each water quality parameter to obtain a plurality of mutually independent binarization judgment results corresponding to each water quality parameter; and then fusing the independent judgment results by adopting a multi-parameter model, and judging again according to the fusion result to obtain a binarization judgment result finally indicating whether the water quality monitoring sampling probe is in water.
Referring to fig. 3, the flow of water quality detection and sampling by using the water quality monitoring and sampling probe provided by the embodiment is as follows:
(1) acquiring each sensing value detected by the water quality parameter probe;
(2) and (4) judging whether the water quality monitoring sampling probe enters water or not according to the sensing numerical value, if not, automatically closing all parts, and if so, entering the step (3).
(3) Detecting water quality parameters through a water quality parameter probe; detecting the wireless communication condition, if the wireless communication signal is good, receiving an instruction sent by an external control mechanism in a wireless communication mode, and collecting a water sample according to the instruction; and sending the detected water quality parameters to an external control mechanism; if the wireless communication signal is not good, entering the step (4);
(4) temporarily storing the detected water quality parameters into a local memory of the main control unit; judging whether the duration of poor communication exceeds the preset duration, if so, starting a water sample extraction unit, and collecting a water sample; if not, the step (2) is entered.
In one embodiment, the step of correcting each sensing quantity between the steps (1) and (2) further includes the following steps:
(a) for a plurality of sensors contained in the water quality parameter probe, respectively obtaining a measured value and an actual value under different measured conditions, wherein the measured value is obtained by sensing the water quality parameter probe of the water quality monitoring sampling probe, and the actual value is obtained by an external standard instrument; the sets of "measured-actual values" obtained constitute the tables required for the calculation of the parameters.
Where "measurement" is a single value or a pair of coupled values. For the "single value" case, for example, the measured value of the temperature sensor is in a one-to-one correspondence with the actual value. For the case of "two coupled values", for example, a measured value of the electrical conductivity is combined with a measured value of the temperature, corresponding to an actual value of the electrical conductivity.
(b) Taking two parameter measurement values in the table as two-dimensional scatter points, and dividing all the scatter points into triangles, wherein the principle is as follows: all triangles do not intersect pairwise, i.e. no overlapping part exists; the divided triangles form a triangle set.
(c) In the actual measurement, for a specific group of measurement values obtained by the water quality parameter probe, the triangle in the triangle set is checked to be positioned inside.
(d) Constructing a space triangle by the found vertexes of the triangle and the actual values corresponding to the vertexes, wherein the equation of the space triangle is expressed as TA; the correction value and the corresponding group of coupled measurement values meet the equation of the space triangle, and therefore the parametric correction value is obtained according to the equation expression of the space triangle and the parametric measurement values.
In the embodiment, the intelligent start-stop control method of the water quality extraction unit of the water quality monitoring sampling probe specifically comprises the following steps:
(a) if the wireless communication quality is good, for example, on the surface of a water body or a shallow water layer, or under the condition of clarified water quality, a control mechanism outside the water body, such as a desktop computer, a mobile computer, an intelligent unmanned aerial vehicle, an intelligent unmanned ship and an embedded computer, realizes the start-stop control of the water quality extraction unit by sending a control command to a main control unit;
(b) if the wireless communication quality is poor, or the wireless communication is disconnected, or the wireless communication does not exist, the main control unit determines whether the water quality detection probe enters water according to the detection value of the water conductivity value detection unit, and controls the water sample extraction unit to be started in a delayed mode according to a preset program, so that automatic water sample collection in a non-communication state is realized.
In an embodiment, the data transmission method with strong adaptability of the wireless data link of the water quality monitoring sampling probe specifically comprises the following steps:
firstly, if the wireless communication quality is good, for example, under the conditions of water surface or shallow water layer or water color clarification, a control mechanism outside the water body, such as a desktop computer, a mobile computer, an intelligent unmanned aerial vehicle, an intelligent unmanned ship and an embedded computer, is communicated with the water quality monitoring sampling probe through a wireless communication unit so as to transmit sensing information;
and secondly, if the wireless communication quality is poor, or the wireless communication is disconnected, or the wireless communication does not exist, storing the sensing monitoring information in the main control unit, and automatically transmitting the temporarily stored sensing monitoring information to the monitoring terminal after the wireless communication is recovered, for example, the water quality probe rises from a deep water layer to an atmospheric space outside a water body.
The water quality monitoring sampling probe provided by the embodiment can automatically detect water inflow and water outflow, automatically control the start and the end of water sample collection, and measure a plurality of variable parameters and non-variable parameters of the same water body at one time; and by realizing effective correction of the measurement of the multi-coupling parameter; the method has the characteristics of low energy consumption, high efficiency and high reliability.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (11)
1. A water quality monitoring sampling probe is characterized by comprising a water quality parameter probe, a water sample extraction unit, a main control unit, a wireless communication unit and a water conductivity value detection unit; the main control unit is in signal connection with the water quality parameter probe, the water sample extraction unit, the wireless communication unit and the water inlet and outlet detection unit;
the water quality parameter probe is used for detecting variable water quality parameters, and the water sample extraction unit is used for extracting a water body to be detected; the main control unit is used for controlling the opening and closing of the water quality parameter probe, the water sample extraction unit and the water inlet and outlet detection unit according to a preset program or an external instruction received by the wireless communication unit, receiving data fed back by the water quality parameter probe, the water sample extraction unit and the water inlet and outlet detection unit and sending the data to the external control mechanism through the wireless communication unit;
the water guide value detection unit is used for detecting the current water guide value; the water outlet and inlet detection unit is used for carrying out water inlet detection and water outlet detection according to the current water guide value; the wireless communication unit is used for realizing communication with an external control mechanism;
the water quality monitoring sampling probe applies a water inlet detection method of the water quality monitoring sampling probe, firstly, whether the probe enters water is judged according to the real-time sensing value of each water quality parameter, and a plurality of mutually independent binaryzation judgment results corresponding to each water quality parameter are obtained; then fusing the independent judgment results, and judging again according to the fusion result to obtain a binarization judgment result finally indicating whether the water quality monitoring sampling probe is in water;
the method comprises the following steps: obtaining an inflow detection judgment result according to the real-time sensing value v of any water quality parameter by adopting a single parameter model; the single parameter model is as follows:
for the case where v and s satisfy "non-negative correlation",
for the case where v and s satisfy "non-positive correlation",
wherein v is a real-time water quality parameter sensing value ThFor high decision threshold, TlA low judgment threshold is set, s is a judgment result, s is 0 and represents 'not in water', and s is 1 and represents 'in water';
the method further comprises the following steps:
obtaining s according to a plurality of water quality parameters real-time sensing values by utilizing a multi-parameter modeltotalValue according to s using the following modeltotalAnd (4) judging water entry:
wherein the multi-parameter model
Wherein s is1、s2、s3、…、si、…、snThe judgment result of whether the probe is in water or not is obtained according to the real-time sensing value of each water quality parameter by adopting a single parameter model，stotalFusing the value for the judgment result; t isthFor a fusion value high decision threshold, TtlAnd determining the threshold as the fusion value is low.
2. The water quality monitoring sampling probe of claim 1, further comprising a water tube connector; the water pipe connector is used for connecting an external water pipe and conveying the water quality sample extracted by the water sample extraction unit to the outside of the water body.
3. The water quality monitoring sampling probe of claim 1 or 2, wherein the water quality parameter measuring probe comprises a composite probe, a turbidity probe and/or a dissolved oxygen probe;
the composite probe is used for detecting the conductivity, pH value and/or temperature value of the water body; the turbidity probe is used for detecting the original value of the turbidity parameter of the water body; the dissolved oxygen probe is used for detecting the original value of the dissolved oxygen parameter of the water body.
4. The water quality monitoring sampling probe of claim 1 or 2, wherein the main control unit is further configured to perform multi-coupling parameter modification on the parameter original value detected by the water quality parameter probe.
5. The water quality monitoring sampling probe of claim 1 or 2, wherein the main control unit performs auxiliary detection of water inlet and outlet according to the measurement value of the water quality parameter probe.
6. The water quality monitoring and sampling probe of claim 1 or 2, wherein the water conductivity detection unit comprises at least two metal contacts, and detects whether the water quality probe is in the water body or outside the water body according to the change of the water conductivity between the metal contacts.
7. A water quality monitoring sampling probe according to claim 1 or 2 further comprising a housing for housing, protecting and carrying the components of the water quality monitoring sampling probe.
8. The water quality monitoring and sampling probe of claim 1 or 2, further comprising a filter cover for intercepting solid impurities in the water body to be detected so as to avoid blocking the probe and protecting the water quality parameter probe.
9. The water quality monitoring sampling probe of claim 1 or 2, further comprising an energy storage unit, wherein the energy storage unit supplies power to the water quality parameter probe, the water sample extraction unit, the main control unit, the wireless communication unit and the water conductivity value detection unit.
10. The water quality monitoring sampling probe of claim 1 or 2, wherein the intelligent start-stop control method of the water quality extraction unit is as follows:
(a) under the normal state of wireless communication, the main control unit controls the switch of the water sample extraction unit according to a control command sent by an external control mechanism and received by the wireless communication unit;
(b) under the condition that the wireless communication state is abnormal, or the wireless communication is disconnected, or the wireless communication does not exist, the main control unit determines whether the water quality detection probe enters water according to the detection value of the water conductivity value detection unit, and controls the water sample extraction unit to be started in a delayed mode according to a preset program, so that the automatic water sample collection under the non-communication state is realized.
11. The water quality monitoring sampling probe of claim 1 or 2, wherein the data transmission method comprises:
(a) under the normal state of wireless communication, the main control unit sends the parameter detection value to an external control mechanism through the wireless communication unit;
(b) and under the condition that the wireless communication state is abnormal, or the wireless communication is disconnected, or the wireless communication does not exist, the main control unit stores the parameter detection value, and automatically transmits the stored parameter detection value to an external control mechanism after the wireless communication is recovered.
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