CN114544500A - Method and system for measuring total phosphorus in sailing type surface water - Google Patents
Method and system for measuring total phosphorus in sailing type surface water Download PDFInfo
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- CN114544500A CN114544500A CN202210176258.1A CN202210176258A CN114544500A CN 114544500 A CN114544500 A CN 114544500A CN 202210176258 A CN202210176258 A CN 202210176258A CN 114544500 A CN114544500 A CN 114544500A
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 107
- 239000011574 phosphorus Substances 0.000 title claims abstract description 107
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000002352 surface water Substances 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 92
- 238000005259 measurement Methods 0.000 claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000010586 diagram Methods 0.000 claims abstract description 9
- 230000002159 abnormal effect Effects 0.000 claims abstract description 7
- 230000029087 digestion Effects 0.000 claims description 61
- 230000002572 peristaltic effect Effects 0.000 claims description 46
- 238000011161 development Methods 0.000 claims description 35
- 238000005070 sampling Methods 0.000 claims description 22
- 239000007800 oxidant agent Substances 0.000 claims description 21
- 230000001590 oxidative effect Effects 0.000 claims description 21
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 239000003638 chemical reducing agent Substances 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000000284 extract Substances 0.000 claims description 6
- 238000005485 electric heating Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 13
- 230000007547 defect Effects 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
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- 238000010561 standard procedure Methods 0.000 description 1
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- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
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- G—PHYSICS
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- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
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- G—PHYSICS
- G01—MEASURING; TESTING
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- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B2035/006—Unmanned surface vessels, e.g. remotely controlled
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Abstract
The invention relates to water quality monitoring, in particular to a method and a system for measuring total phosphorus in surface water in a sailing mode, wherein a power supply system on an intelligent unmanned ship is turned on, and whether the states of the intelligent unmanned ship and total phosphorus detection equipment are normal or not is checked; planning a sailing route and setting the speed of a sailing ship; the intelligent unmanned ship starts a navigation mode and automatically navigates according to a set navigation route and the speed of the navigation ship; starting a total phosphorus continuous sample measuring mode by total phosphorus detection equipment; aligning the current measurement value with the detection position; storing the aligned data to a shipborne industrial personal computer and a cloud server; stopping continuous sample measurement after the sailing is finished, and disconnecting the power supply after the water sample in the room to be cleared is processed; generating a thermodynamic diagram reflecting the spatial distribution of the total phosphorus on a map based on the original data, and generating a total phosphorus distribution report; the technical scheme provided by the invention can overcome the defects that the intensive monitoring requirements of the total phosphorus parameter of the surface water on time and space cannot be met, and the specific position of abnormal measurement data cannot be accurately judged.
Description
Technical Field
The invention relates to water quality monitoring, in particular to a method and a system for measuring total phosphorus in navigation type surface water.
Background
Along with the higher and higher requirements of people on water quality environment monitoring, the requirements of water quality data on time and space are higher and higher, so that unmanned ships are more and more applied in the current water quality monitoring field.
Sensors capable of rapidly detecting water quality five parameters and the like by an electrode method are mounted on a plurality of unmanned ships, but a simple and effective means for monitoring total phosphorus parameters of the whole water area is not available. Currently, surface water total phosphorus monitoring generally uses a fixed station and utilizes a national standard method for total phosphorus detection, and the total phosphorus monitoring method has two disadvantages: firstly, the monitoring range is limited, and the specific position of the parameter abnormity can not be accurately judged, secondly, the detection time of the national standard law is long, and generally, more than 15 minutes is needed for obtaining detection data at the fastest detection point. Therefore, the existing total phosphorus measurement method cannot meet the intensive monitoring requirements of the total phosphorus parameters of the surface water on time and space.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects in the prior art, the invention provides a method and a system for measuring total phosphorus in surface water in a sailing mode, which can effectively overcome the defects that the prior art cannot meet the intensive monitoring requirements of the total phosphorus parameters in the surface water on time and space and cannot accurately judge the specific position of abnormal measurement data.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
a method for measuring total phosphorus in sailing type surface water comprises the following steps:
s1, turning on a power supply system on the intelligent unmanned ship, and powering on equipment on the ship;
s2, checking whether the states of the intelligent unmanned ship and the total phosphorus detection equipment are normal, if so, entering S3, and otherwise, stopping working;
s3, planning a navigation route and setting the speed of a navigation ship;
s4, starting a navigation mode of the intelligent unmanned ship, and automatically navigating according to the set navigation route and the navigation speed;
s5, starting a total phosphorus continuous sample measuring mode by total phosphorus detection equipment;
s6, aligning the current measurement value with the detection position;
s7, storing the data after alignment processing to a shipborne industrial personal computer and a cloud server;
s8, stopping continuous sample measurement after the navigation is finished, and disconnecting the power supply after the water sample in the room to be digested is processed;
and S9, generating a thermodynamic diagram reflecting the spatial distribution of the total phosphorus on the map based on the original data, and generating a total phosphorus distribution report.
Preferably, the total phosphorus detection device in S5 starts a total phosphorus continuous sample measurement mode, including:
s51, feeding a sample by total phosphorus detection equipment according to a certain frequency, and recording each detection point and a corresponding GPS position and time during sampling to a detection point information table;
s52, carrying out streamlined digestion by total phosphorus detection equipment;
s53, displaying and carrying out colorimetric measurement by total phosphorus detection equipment to obtain a current measurement value;
the method comprises the steps that in the process that total phosphorus detection equipment starts a total phosphorus continuous sample measuring mode, whether the state of the total phosphorus detection equipment is normal or not needs to be monitored in real time, and when the state of the total phosphorus detection equipment is abnormal, measurement is stopped.
Preferably, the total phosphorus detection device in S51 samples at a certain frequency, and includes:
the water sample to be measured is automatically measured through the water collecting peristaltic pump linkage metering pipe, the oxidant micro pump leads the oxidant in the oxidant bottle into the pipeline, the preposed peristaltic pump is matched with the rotary valve to lead the oxidant and the water sample to be measured into the digestion pipe inside the digestion box respectively for digestion, and the heating wire of the digestion chamber inside the digestion box is heated and keeps a proper temperature.
Preferably, the running digestion of the total phosphorus detection device in S52 includes:
in the digestion process, the preposed peristaltic pump is matched with the rotary valve to feed a sample into the digestion tube, and the digestion solution which is digested in the digestion tube is pumped out through the postposition peristaltic pump.
Preferably, the total phosphorus detection device in S53 performs display and colorimetric measurement, including:
the postposition peristaltic pump pushes the digestion solution into a measuring tube in the color development box, a reducing agent micro pump extracts a proper amount of reducing agent from a reducing agent bottle, a display agent micro pump extracts a proper amount of color developing agent from a color developing agent bottle, the color developing agent is added into the measuring tube for color development reaction, and then the color comparison tube is measured, absorbed, emptied and cleaned;
in the whole color development reaction process, the stability of the color development temperature is kept by the heating wire of the color development box in the color development box.
Preferably, the aligning process of the current measurement value with the detection position in S6 includes:
and matching the current measurement value with the GPS position based on the detection point information table and the sampling time.
A sailing type surface water total phosphorus measurement system comprises an intelligent unmanned ship and total phosphorus detection equipment installed on the intelligent unmanned ship, wherein a water collection peristaltic pump, a front peristaltic pump, a digestion chamber, a rear peristaltic pump and a color development box are sequentially arranged in the total phosphorus detection equipment;
an oxidant bottle is arranged between the water collection peristaltic pump and the front peristaltic pump, an oxidant micro pump is arranged on the oxidant bottle, a digestion tube and a digestion chamber electric heating wire are arranged in the digestion chamber, and a rotary valve which is connected with the front peristaltic pump and the rear peristaltic pump and is selectively and correspondingly connected to a digestion tube channel through a rotary valve head is arranged on the digestion chamber;
the inside buret of surveying, color development case heating wire of being equipped with of color development case, survey buret and pass through reductant micropump, color development agent micropump and insert reductant bottle, color development agent bottle respectively.
Preferably, still be equipped with on-board industrial computer, communication system and shipboard electrical power generating system on the intelligent unmanned ship, on-board industrial computer control total phosphorus check out test set work, read, save the detection data of total phosphorus check out test set collection to local to through communication system with data storage to cloud ware.
Preferably, the shipborne industrial personal computer and the total phosphorus detection equipment communicate through an RS232 interface and use a modbus communication protocol.
Preferably, the device further comprises a metering pipe which is arranged between the water sampling peristaltic pump and the front peristaltic pump and is used for automatically metering the water sample to be measured collected by the water sampling peristaltic pump.
(III) advantageous effects
Compared with the prior art, the method and the system for measuring the total phosphorus in the sailing type surface water have the following beneficial effects:
1) the digestion stage usually has the shortest time of 10-15 minutes, and cannot be shortened by heating, pressurizing and other modes, a streamlined digestion method is introduced to shorten the digestion time, the color development reaction usually needs 10-13 minutes at room temperature, the color development efficiency is improved by a method of improving the color development temperature through external heating, and the color development time is controlled within 3 minutes, so that the intensive monitoring requirements of the total phosphorus parameters of surface water on time and space can be met;
2) when the total phosphorus detection equipment is used for sampling, the GPS position and time corresponding to each detection point during sampling are recorded into the detection point information table, the current measurement value is matched with the GPS position based on the detection point information table and the sampling time after the measurement value is obtained, and thermodynamic diagrams reflecting the spatial distribution of the total phosphorus are generated on a map, so that the total phosphorus parameter of the whole water area can be clearly and visually monitored, and specific position information corresponding to abnormal measurement data can be accurately judged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic diagram of an intelligent unmanned ship according to the present invention;
FIG. 3 is a schematic view showing the connection relationship of the components in the total phosphorus detecting apparatus shown in FIG. 2;
fig. 4 is a schematic diagram of a communication relationship on the intelligent unmanned ship in the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A method for measuring total phosphorus in sailing type surface water is shown in figure 1 and comprises the following steps:
s1, turning on a power supply system on the intelligent unmanned ship 1, and powering on equipment on the ship;
s2, checking whether the states of the intelligent unmanned ship 1 and the total phosphorus detection equipment 2 are normal or not, if so, entering S3, and otherwise, stopping working;
s3, planning a navigation route and setting the speed of a navigation ship;
s4, the intelligent unmanned ship 1 starts a navigation mode and automatically navigates according to the set navigation route and the navigation ship speed;
s5, starting a total phosphorus continuous sample measuring mode by the total phosphorus detection equipment 2;
s6, aligning the current measurement value with the detection position;
s7, storing the data after alignment processing to a shipborne industrial personal computer and a cloud server;
s8, stopping continuous sample measurement after the sailing is finished, and disconnecting the power supply after the water sample in the digestion chamber 206 is processed;
and S9, generating a thermodynamic diagram reflecting the spatial distribution of the total phosphorus on the map based on the original data, and generating a total phosphorus distribution report.
Wherein, total phosphorus check out test set 2 starts total phosphorus and surveys appearance mode in succession, includes:
s51, feeding samples by the total phosphorus detection equipment 2 according to the frequency of 3 min/time, and recording the corresponding GPS position and time of each detection point and sampling to a detection point information table;
s52, carrying out flowing digestion on the total phosphorus detection equipment 2;
and S53, displaying and carrying out colorimetric measurement by the total phosphorus detection device 2 to obtain a current measurement value.
Wherein, carry on the alignment treatment to present measured value and detection position, including:
and matching the current measurement value with the GPS position based on the detection point information table and the sampling time.
In the technical scheme of the application, the speed of the ship is set to be 1m/s, and the time interval of two continuous detection results obtained by the total phosphorus detection equipment 2 is 3min (15 min is needed in each detection process to obtain detection data), so that a detection point is set every 180m in the route. Because the total phosphorus detection device 2 samples according to the frequency of 3 min/time, the obtained current measurement value is not the detection result corresponding to the current detection point, and the current measurement value can be matched with the GPS position of the corresponding detection point based on the detection point information table and the sampling time.
In the technical scheme, when the total phosphorus detection device 2 is used for sampling, the GPS position and time corresponding to each detection point and sampling are recorded to the detection point information table, the current measurement value is matched with the GPS position based on the detection point information table and the sampling time after the measurement value is obtained, and thermodynamic diagrams reflecting the spatial distribution of the total phosphorus are generated on the map, so that the total phosphorus parameter of the whole water area can be clearly and visually monitored, and the specific position information corresponding to abnormal measurement data can be accurately judged.
In the process that the total phosphorus detection device 2 starts the total phosphorus continuous sample measurement mode, whether the state of the total phosphorus detection device 2 is normal needs to be monitored in real time, and when the state of the total phosphorus detection device 2 is abnormal, the measurement is stopped.
In the process of starting the total phosphorus continuous sample measurement mode by the total phosphorus detection device 2:
the total phosphorus detection device 2 samples according to a certain frequency, and comprises:
the water sampling peristaltic pump 201 is linked with the metering pipe 204 to automatically meter the water sample to be measured, the oxidant micro pump 203 introduces the oxidant in the oxidant bottle 202 into the pipeline, the preposed peristaltic pump 205 is matched with the rotary valve 209 to respectively introduce the oxidant and the water sample to be measured into the digestion pipe 207 in the digestion tank 206 for digestion, and the heating wire 208 of the digestion chamber in the digestion tank 206 is heated and keeps a proper temperature;
carrying out streamlined digestion on the total phosphorus detection equipment 2, comprising the following steps:
in the digestion process, the prepositive peristaltic pump 205 is matched with the rotary valve 209 to feed a sample into the digestion tube 207, and digestion liquid which is digested in the digestion tube 207 is pumped out through the postpositive peristaltic pump 210;
③ the total phosphorus detection device 2 carries out display and colorimetric measurement, comprising:
the postposition peristaltic pump 210 pushes the digestion solution into a measuring tube 216 inside a color development box 215, a reducing agent micro pump 213 extracts a proper amount of reducing agent from a reducing agent bottle 211, a display agent micro pump 214 extracts a proper amount of color development agent from a color development agent bottle 212, the color development reaction is carried out by adding the measuring tube 216, then the measurement absorption is carried out, and the color comparison tube is emptied and cleaned;
in the whole color development reaction process, the heating wire 217 of the color development box in the color development box 215 keeps the color development temperature stable.
The shortest time of the digestion stage is usually 10-15 minutes, and the digestion stage cannot be shortened by heating, pressurizing and other modes; the developing reaction usually needs 10-13 minutes at room temperature, the developing efficiency is improved by a method of improving the developing temperature through external heating, and the developing time is controlled within 3 minutes, so that the intensive monitoring requirements of the total phosphorus parameters of the surface water on time and space can be met.
A total phosphorus measurement system of an ocean going type surface water is shown in figures 2 and 3 and comprises an intelligent unmanned ship 1 and total phosphorus detection equipment 2 installed on the intelligent unmanned ship 1, wherein a water collection peristaltic pump 201, a front peristaltic pump 205, a digestion chamber 206, a rear peristaltic pump 210 and a color development box 215 are sequentially arranged inside the total phosphorus detection equipment 2;
an oxidant bottle 202 is arranged between the water collection peristaltic pump 201 and the front peristaltic pump 205, an oxidant micro pump 203 is arranged on the oxidant bottle 202, a digestion tube 207 and a digestion chamber heating wire 208 are arranged in the digestion chamber 206, and a rotary valve 209 which is connected with the front peristaltic pump 205 and the rear peristaltic pump 210 and is selectively and correspondingly connected to a channel of the digestion tube 207 through a rotary valve head is arranged on the digestion chamber 206;
a measuring pipe 216 and a heating wire 217 of the color developing box are arranged in the color developing box 215, and the measuring pipe 216 is respectively connected to the reducing agent bottle 211 and the color developing agent bottle 212 through a reducing agent micro pump 213 and a color developing agent micro pump 214.
The device also comprises a metering pipe 204 which is arranged between the water sampling peristaltic pump 201 and the prepositive peristaltic pump 205 and is used for automatically metering the water sample to be measured which is collected by the water sampling peristaltic pump 201. The water sample to be measured can be automatically measured through the water sampling peristaltic pump 201 and the linkage measuring pipe 204.
As shown in fig. 4, a shipborne industrial personal computer, a communication system and a shipborne power system are further arranged on the intelligent unmanned ship 1, the shipborne industrial personal computer controls the total phosphorus detection device 2 to work, reads and stores detection data acquired by the total phosphorus detection device 2 to the local, and stores the data to a cloud server through a 4G/5G communication system. The shipborne industrial personal computer and the total phosphorus detection equipment 2 communicate through an RS232 interface and use a modbus communication protocol.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. A method for measuring total phosphorus in sailing type surface water is characterized by comprising the following steps: the method comprises the following steps:
s1, turning on a power supply system on the intelligent unmanned ship (1), and powering on equipment on the ship;
s2, checking whether the states of the intelligent unmanned ship (1) and the total phosphorus detection equipment (2) are normal, if so, entering S3, and otherwise, stopping working;
s3, planning a navigation route and setting the speed of a navigation ship;
s4, starting a navigation mode of the intelligent unmanned ship (1), and automatically navigating according to the set navigation route and the navigation speed;
s5, starting a total phosphorus continuous sample measuring mode by the total phosphorus detection equipment (2);
s6, aligning the current measurement value with the detection position;
s7, storing the data after alignment processing to a shipborne industrial personal computer and a cloud server;
s8, stopping continuous sample measurement after the sailing is finished, and disconnecting the power supply after the water sample in the digestion chamber (206) is treated;
and S9, generating a thermodynamic diagram reflecting the spatial distribution of the total phosphorus on the map based on the original data, and generating a total phosphorus distribution report.
2. The method of claim 1, wherein the method comprises the steps of: in S5, the total phosphorus detection device (2) starts a total phosphorus continuous sampling mode including:
s51, feeding a sample by the total phosphorus detection equipment (2) according to a certain frequency, and recording each detection point and a corresponding GPS position and time during sampling to a detection point information table;
s52, carrying out flowing digestion on the total phosphorus detection equipment (2);
s53, displaying and carrying out colorimetric measurement by the total phosphorus detection equipment (2) to obtain a current measurement value;
when the total phosphorus detection device (2) starts the total phosphorus continuous sample measurement mode, whether the state of the total phosphorus detection device (2) is normal needs to be monitored in real time, and when the state of the total phosphorus detection device (2) is abnormal, the measurement is stopped.
3. The method of claim 2, wherein the method comprises the steps of: the total phosphorus detection device (2) in S51 samples according to a certain frequency, and comprises:
the water sample to be measured is automatically measured through the linkage metering pipe (204) of the water collecting peristaltic pump (201), the oxidant introducing pipeline in the oxidant bottle (202) is introduced by the oxidant micro pump (203), the preposed peristaltic pump (205) is matched with the rotary valve (209) to respectively introduce the oxidant and the water sample to be measured into the digestion pipe (207) inside the digestion box (206) for digestion, and the heating wire (208) of the digestion chamber inside the digestion box (206) is heated and keeps a proper temperature.
4. The method of claim 2, wherein the method comprises the steps of: in the S52, the total phosphorus detection device (2) performs streamlined digestion, and the method comprises the following steps:
in the digestion process, a preposed peristaltic pump (205) is matched with a rotary valve (209) to feed a sample into the digestion tube (207), and the digestion solution which is digested in the digestion tube (207) is pumped out through a postposition peristaltic pump (210).
5. The method of claim 2, wherein the method comprises the steps of: the total phosphorus detection device (2) in S53 performs display and colorimetric measurement, and comprises:
a peristaltic pump (210) is arranged at the rear end, digestion liquid is pushed into a measuring tube (216) in a color development box (215), a reducing agent micro pump (213) extracts a proper amount of reducing agent from a reducing agent bottle (211), a display agent micro pump (214) extracts a proper amount of color developing agent from a color developing agent bottle (212), the measuring tube (216) is added for color development reaction, then measurement and absorption are carried out, and the color comparison tube is emptied and cleaned;
in the whole color development reaction process, the electric heating wire (217) of the color development box in the color development box (215) keeps the color development temperature stable.
6. The method of claim 2, wherein the method comprises the steps of: the aligning process of the current measurement value with the detection position in S6 includes:
and matching the current measurement value with the GPS position based on the detection point information table and the sampling time.
7. A measurement system based on the method for measuring total phosphorus in navigable surface water according to claim 2, characterized in that: the system comprises an intelligent unmanned ship (1) and total phosphorus detection equipment (2) arranged on the intelligent unmanned ship (1), wherein a water collection peristaltic pump (201), a front peristaltic pump (205), a digestion chamber (206), a rear peristaltic pump (210) and a color development box (215) are sequentially arranged in the total phosphorus detection equipment (2);
an oxidant bottle (202) is arranged between the water collection peristaltic pump (201) and the preposed peristaltic pump (205), an oxidant micro pump (203) is arranged on the oxidant bottle (202), a digestion tube (207) and a digestion chamber heating wire (208) are arranged in the digestion chamber (206), and a rotary valve (209) which is connected with the preposed peristaltic pump (205) and the postposed peristaltic pump (210) and is selectively and correspondingly connected to a channel of the digestion tube (207) through a rotary valve head is arranged on the digestion chamber (206);
the color development box (215) is internally provided with a measuring pipe (216) and a color development box electric heating wire (217), and the measuring pipe (216) is respectively connected into a reducing agent bottle (211) and a color development agent bottle (212) through a reducing agent micro pump (213) and a color development agent micro pump (214).
8. The navigable surface water total phosphorus measurement system of claim 7, wherein: the intelligent unmanned ship (1) is further provided with a shipborne industrial personal computer, a communication system and a shipborne power system, the shipborne industrial personal computer controls the total phosphorus detection equipment (2) to work, reads and stores detection data collected by the total phosphorus detection equipment (2) to the local, and stores the data to a cloud server through the communication system.
9. The navigable surface water total phosphorus measurement system of claim 8, wherein: the shipborne industrial personal computer and the total phosphorus detection equipment (2) are communicated through an RS232 interface, and a modbus communication protocol is used.
10. The navigable surface water total phosphorus measurement system of claim 7, wherein: the device also comprises a metering pipe (204) which is arranged between the water sampling peristaltic pump (201) and the prepositive peristaltic pump (205) and is used for automatically metering the water sample to be measured which is collected by the water sampling peristaltic pump (201).
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