CN107727819B - NB-IOT based self-powered multi-parameter water quality monitor - Google Patents
NB-IOT based self-powered multi-parameter water quality monitor Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 170
- 238000001514 detection method Methods 0.000 claims abstract description 82
- 238000004891 communication Methods 0.000 claims abstract description 51
- 238000000034 method Methods 0.000 claims abstract description 4
- 238000010248 power generation Methods 0.000 claims description 23
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 16
- 229910052760 oxygen Inorganic materials 0.000 claims description 16
- 239000001301 oxygen Substances 0.000 claims description 16
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 10
- 238000001228 spectrum Methods 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 238000002835 absorbance Methods 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000003908 quality control method Methods 0.000 claims 1
- 239000003990 capacitor Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000002618 waking effect Effects 0.000 description 1
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- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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Abstract
The invention provides a self-powered multi-parameter water quality monitor based on an NB-IOT (remote control-internet of things), which comprises a main control chip, an NB-IOT communication module, a multi-parameter water quality detection module and a self-powered device for providing power, wherein the main control chip is respectively connected with the NB-IOT communication module and the multi-parameter water quality detection module; the main control chip outputs a parameter detection instruction to the multi-parameter water quality detection module according to an operation instruction sent by the cloud end and received by the NB-IOT communication module, processes a water quality detection result returned by the multi-parameter water quality detection module and uploads the water quality detection result to the cloud end through the NB-IOT communication module.
Description
Technical Field
The invention relates to water quality monitoring equipment, in particular to a self-powered multi-parameter water quality monitor based on NB-IOT.
Background
The multi-parameter water quality monitor realizes on-line monitoring of a plurality of different parameter values simultaneously by selecting and matching sensors, including temperature/PH/conductivity/dissolved oxygen/turbidity/sludge concentration/ammonia nitrogen concentration and the like, and is mainly applied to the fields of sewage plants, water works, water stations, surface water, industry and the like. The traditional multiparameter water quality monitor needs to be powered by an alternating current power supply, and collected monitoring data is uploaded to external equipment in a wired communication mode such as MODBUS, RS485 and the like, so that the multiparameter water quality monitor is difficult to use in occasions without commercial power or occasions inconvenient to wire.
In order to solve the above problems, an ideal technical solution is always sought.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, thereby providing the self-powered multi-parameter water quality monitor based on the NB-IOT, which is scientific in design and strong in practicability.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the self-powered multi-parameter water quality monitor based on the NB-IOT comprises a main control chip, an NB-IOT communication module, a multi-parameter water quality detection module and a self-powered device for providing power, wherein the main control chip is respectively connected with the NB-IOT communication module and the multi-parameter water quality detection module;
The NB-IOT communication module is used for data transmission between the main control chip and the cloud;
the main control chip outputs a parameter detection instruction to the multi-parameter water quality detection module according to an operation instruction sent by the cloud end and received by the NB-IOT communication module, processes a water quality detection result returned by the multi-parameter water quality detection module and uploads the water quality detection result to the cloud end through the NB-IOT communication module;
The multi-parameter water quality detection module comprises a wide spectrum detection unit, a plurality of single water quality parameter sensors and a sensor selection module, wherein the wide spectrum detection unit is connected with the main control chip and is used for detecting four water quality parameters of chromaticity, turbidity, total organic carbon TOC and chemical oxygen demand of a water body according to a parameter detection instruction sent by the main control chip; the sensor selection module is respectively connected with the main control chip and the plurality of single water quality parameter sensors, and controls the corresponding single water quality parameter sensors to carry out water quality detection according to the parameter detection instruction sent by the main control chip.
Based on the above, the plurality of single water quality parameter sensors comprise a temperature sensor, a PH value sensor, a dissolved oxygen sensor, a conductivity sensor, a turbidity sensor, an ammonia nitrogen sensor and a water quality hardness sensor, wherein the temperature sensor is used for measuring the temperature of a water body, the PH value sensor is used for measuring the PH value in the water body, the dissolved oxygen sensor is used for measuring the dissolved oxygen rate in the water body, the conductivity sensor is used for measuring the conductivity in the water body, and the turbidity sensor is used for measuring the turbidity of the water body; the ammonia nitrogen sensor is used for measuring the ammonia nitrogen concentration in the water body; the water hardness sensor is used for measuring the water hardness in the water body.
Based on the above, the broad spectrum detection unit comprises a multispectral LED light source, a first collimating lens, a detection pool filled with a water body to be detected, a second collimating lens and a photoelectric detector, wherein the photoelectric detector comprises a plurality of photosensitive LEDs, the multispectral LED light source comprises a digital switch and a plurality of single-band narrow-band LED light sources respectively connected with the digital switch, the digital switch is also connected with the self-powered device, and the multispectral LED light sources of the plurality of single-band narrow-band LED light sources are driven to emit multispectral LED light according to parameter detection instructions sent by the main control chip; the multispectral LED light irradiates on a water body to be detected in the detection pool through the first collimating lens, and irradiates on a plurality of photosensitive LEDs through the second collimating lens after being absorbed by the water body to be detected so as to detect the light absorbance of the water sample to be detected in the detection pool; and the main control chip obtains four water quality parameters of chromaticity, turbidity, total organic carbon TOC and chemical oxygen demand of the water body according to the light absorbance of the water sample to be detected in the detection tank.
Based on the above, the side wall of the detection tank parallel to the multispectral LED light is also provided with a water inlet and a water outlet respectively, the water inlet is connected with a water inlet pipe, and the water outlet is connected with a water outlet pipe.
Based on the above, the self-powered device comprises a vibration power generation unit, a solar power generation unit, a modulation unit, a rectification circuit, a battery and a power supply management unit, wherein the modulation unit modulates alternating currents generated by the vibration power generation unit and the solar power generation unit into preset voltages respectively, and simultaneously charges the battery through the rectification circuit; the battery provides power to the outside through the power management unit.
Based on the above, the master chip is an MSP430 serial chip of TI, the sensor selection module is 2 74HC4052 chips, a p0_2 pin of the MSP430 serial chip is connected with a UART1_rx pin of the NB-IOT communication module, a p0_3 pin of the MSP430 serial chip is connected with a UART1_tx pin of the NB-IOT communication module, a p0_4 pin of the MSP430 serial chip is connected with a rst_nb pin of the NB-IOT communication module, a p0_5 pin of the MSP430 serial chip is connected with a RING pin of the NB-IOT communication module, and a p0_7 pin of the MSP430 serial chip is connected with a reference voltage VREF;
The P1_2 pin of the MSP430 series chip is connected with the INH pin of one 74HC4052 chip, the P1_3 pin of the MSP430 series chip is connected with the INH pin of the other 74HC4052 chip, the P1_4 pin of the MSP430 series chip is respectively connected with the B pins of 2 74HC4052 chips, the P1_5 pin of the MSP430 series chip is respectively connected with the A pins of 2 74HC4052 chips, the P1_6 pin of the MSP430 series chip is respectively connected with the X pins of 2 74HC4052 chips, and the P1_7 pin of the MSP430 series chip is respectively connected with the Y pins of 2 74HC4052 chips; the X0 pin-X2 pin and the Y0 pin-Y2 pin of the 2 74HC4052 chips form 6 pairs of read-write control pins, and the MSP430 series chips for respectively controlling a plurality of single water quality parameter sensors to perform water quality detection and uploading water quality detection results to the TI.
Based on the above, the mobile phone further comprises a Bluetooth communication unit, and the main control chip is communicated with an external handheld terminal through the Bluetooth communication unit.
Based on the above, the system also comprises an operation key for parameter configuration and a display screen for displaying the running parameters of the self-powered multi-parameter water quality monitor.
Compared with the prior art, the invention has outstanding substantive characteristics and remarkable progress, in particular to the invention adopts a vibration power generation or solar power generation mode to supply power to the multi-parameter water quality monitor, can also monitor water quality when no commercial power exists, and expands the application range of the multi-parameter water quality monitor; the NB-IOT communication module is adopted to communicate with the outside, wiring is not needed, penetrating power is strong, covering distance is large, and the NB-IOT communication module can be connected with a plurality of outside devices at the same time, so that the NB-IOT communication module has the advantages of being scientific in design, strong in practicability, low in power consumption and low in cost.
Drawings
Fig. 1 is a functional block diagram of the present invention.
Fig. 2 is a functional block diagram of the self-powered device of the present invention.
Fig. 3 is a schematic block diagram of a broad spectrum detection unit of the present invention.
Fig. 4 is a circuit schematic diagram of the main control chip and the sensor selection module of the present invention.
Fig. 5 is a schematic circuit diagram of a bluetooth communication unit according to the invention.
In the figure: 1. a multispectral LED light source; 2. a first collimating lens; 3. a detection pool; 4. a first collimating lens; 5. a photodetector; 6. a water inlet pipe; 7. and a water outlet pipe.
Detailed Description
The technical scheme of the invention is further described in detail through the following specific embodiments.
As shown in fig. 1 and fig. 2, the self-powered multi-parameter water quality monitor based on the NB-IOT comprises a main control chip, an NB-IOT communication module, a multi-parameter water quality detection module and a self-powered device for providing power, wherein the main control chip is respectively connected with the NB-IOT communication module and the multi-parameter water quality detection module.
The NB-IOT communication module is used for data transmission between the main control chip and the cloud.
The self-powered device comprises a vibration power generation unit, a solar power generation unit, a modulation unit, a rectification circuit, a battery and a power supply management unit, wherein the modulation unit modulates alternating currents generated by the vibration power generation unit and the solar power generation unit into preset voltages respectively and simultaneously charges the battery through the rectification circuit; the battery provides power to the outside through the power management unit. The alternating current output by the vibration power generation unit and the alternating current output by the solar power generation unit are changed into alternating current with the same frequency, amplitude and phase after being modulated by the modulation unit, and the vibration power generation unit and the solar power generation unit can charge the battery at the same time.
Specifically, the NB-IOT communication module sends the received operation instruction sent by the cloud to the main control chip; the main control chip outputs a parameter detection instruction to the multi-parameter water quality detection module according to the operation instruction received by the NB-IOT communication module; the multi-parameter water quality monitoring module detects water quality parameters according to the parameter detection instruction sent by the main control chip, and returns the water quality monitoring result to the main control chip; and the main control chip processes the water quality detection result returned by the multi-parameter water quality detection module and uploads the water quality detection result to the cloud through the NB-IOT communication module.
The multi-parameter water quality detection module comprises a wide spectrum detection unit, a plurality of single water quality parameter sensors and a sensor selection module, wherein the wide spectrum detection unit is connected with the main control chip and is used for detecting four water quality parameters of chromaticity, turbidity, total organic carbon TOC and chemical oxygen demand of a water body according to a parameter detection instruction sent by the main control chip; the sensor selection module is respectively connected with the main control chip and the plurality of single water quality parameter sensors, and controls the corresponding single water quality parameter sensors to carry out water quality detection according to the parameter detection instruction sent by the main control chip.
Specifically, as shown in fig. 3, the broad spectrum detection unit includes a multispectral LED light source 1, a first collimating lens 2, a detection pool 3 containing a water body to be detected, a second collimating lens 4 and a photodetector 5, the photodetector 5 includes a plurality of photosensitive LEDs, the multispectral LED light source includes a digital switch and a plurality of single-band narrow-band LED light sources respectively connected with the digital switch, the digital switch is also connected with the self-powered device, and the multispectral LED light sources of the plurality of single-band narrow-band LED light sources are driven to emit multispectral LED light according to parameter detection instructions sent by the main control chip; the multispectral LED light irradiates onto the water to be detected in the detection tank 3 through the first collimating lens 2, and irradiates onto a plurality of photosensitive LEDs through the second collimating lens after being absorbed by the water to be detected so as to detect the light absorbance of the water sample to be detected in the detection tank; and the main control chip obtains four water quality parameters of chromaticity, turbidity, total organic carbon TOC and chemical oxygen demand of the water body according to the light absorbance of the water sample to be detected in the detection tank 3.
Preferably, the side wall of the detection tank 3 parallel to the multispectral LED light is also provided with a water inlet and a water outlet respectively, the water inlet is connected with a water inlet pipe 6, and the water outlet is connected with a water outlet pipe 7. The water to be measured flows into the detection tank from the water inlet pipe and flows out from the water outlet pipe; the broad spectrum detection unit detects the water quality parameters of the water body to be detected in the detection pool in real time.
The system comprises a plurality of single water quality parameter sensors, a temperature sensor, a PH value sensor, a dissolved oxygen sensor, a conductivity sensor, a turbidity sensor, an ammonia nitrogen sensor and a water quality hardness sensor, wherein the temperature sensor is used for measuring the temperature of a water body, the PH value sensor is used for measuring the PH value in the water body, the dissolved oxygen sensor is used for measuring the dissolved oxygen rate in the water body, the conductivity sensor is used for measuring the conductivity in the water body, and the turbidity sensor is used for measuring the turbidity of the water body; the ammonia nitrogen sensor is used for measuring the ammonia nitrogen concentration in the water body; the water hardness sensor is used for measuring the water hardness in the water body.
Because the invention adopts the vibration invention and solar power generation to carry out self-power supply, in order to ensure the service time of the invention and avoid the occurrence of power failure, the invention adopts the MSP430 series chip of TI as a main control chip, and the MSP430 series chip is a 16-bit ultra-low power consumption mixed signal processor (Mixed Signal Processor) with Reduced Instruction Set (RISC) which starts to be introduced to the market in 1996 of Texas Instruments (TI).
Preferably, as shown in fig. 4, the sensor selection module is 2 74HC4052 chips, and a p0_2 pin of the MSP430 serial chip is connected to a uart1_rx pin of the NB-IOT communication module, and is configured to receive a parameter detection instruction sent by the MSP430 serial chip; the P0_3 pin of the MSP430 series chip is connected with the UART1_TX pin of the NB-IOT communication module, and is used for uploading a water quality detection result to the MSP430 series chip; the P0_4 pin of the MSP430 series chip is connected with the RST_NB pin of the NB-IOT communication module and is used for resetting the NB-IOT communication module; the P0_5 pin of the MSP430 series chip is connected with the RING pin of the NB-IOT communication module, and the P0_7 pin of the MSP430 series chip is connected with a reference voltage VREF;
The P1_2 pin of the MSP430 series chip is connected with the INH pin of one 74HC4052 chip, and the P1_3 pin of the MSP430 series chip is connected with the INH pin of the other 74HC4052 chip for waking up the 74HC4052 chip; the P1_4 pins of the MSP430 series chip are respectively connected with the B pins of the 274 HC4052 chips, the P1_5 pins of the MSP430 series chip are respectively connected with the A pins of the 274 HC4052 chips, the P1_6 pins of the MSP430 series chip are respectively connected with the X pins of the 274 HC4052 chips, and the P1_7 pins of the MSP430 series chip are respectively connected with the Y pins of the 274 HC4052 chips; the X0 pin-X2 pin and the Y0 pin-Y2 pin of the 274 HC4052 chips form 6 pairs of read-write control pins, and the MSP430 series chips for respectively controlling a plurality of single water quality parameter sensors to perform water quality detection and uploading water quality detection results to the TI.
The invention adopts a solar power generation mode and a vibration power generation mode to supply power to the multi-parameter water quality monitor, and can also monitor water quality when no commercial power exists, thereby expanding the application range of the multi-parameter water quality monitor; the NB-IOT communication module is adopted to communicate with the outside, wiring is not needed, penetrating power is high, and coverage distance is large; meanwhile, the use duration of the invention can be prolonged by adopting a low-power-consumption main control chip and a low-power-consumption NB-IOT communication module; the types of the sensors in the multi-parameter sensor group are not limited to the above types, and corresponding sensors such as an atmospheric pressure sensor and the like can be added according to the needs, so that the application range of the multi-parameter water quality monitor is improved, and the multi-parameter water quality monitor has the advantages of being scientific in design, strong in practicability, low in power consumption and low in cost.
Based on the above, the mobile phone further comprises a Bluetooth communication unit, and the main control chip is communicated with an external handheld terminal through the Bluetooth communication unit. For example, the GPS coordinates are measured by a handheld operation debugger with a built-in GPS module, and the GPS coordinates are wirelessly input into the multi-parameter water quality monitor through the Bluetooth communication unit; setting an IP address and an MAC address of the multi-parameter water quality monitor through the Bluetooth communication unit; and the detection data can be directly obtained through the Bluetooth communication unit when the NB-IOT communication module fails.
Specifically, as shown in fig. 5, the bluetooth communication unit includes an rf_p pin, an rf_n pin, an inductor L1, an inductor L2, an inductor L3, and an inductor L4 of the MSP430 serial chip, where the rf_p pin of the MSP430 serial chip is connected to the antenna through a capacitor C1, a capacitor C2, an inductor L2, and an inductor L3 in sequence, a common end of the capacitor C1 and the capacitor C2 is grounded through the inductor L1, and a common end of the inductor L3 and the inductor L4 is grounded through the capacitor C3; the common end of the capacitor C2 and the inductor L2 is connected with the RF_N pin of the MSP430 series chip through the inductor L4 and the capacitor C5; the common terminal of the inductor L4 and the capacitor C5 is grounded through a capacitor C6.
Specifically, the self-powered multi-parameter water quality detector also comprises an operation key for parameter configuration and a display screen for displaying the running parameters of the self-powered multi-parameter water quality monitor; for example, when the number and variety of sensors are increased, parameter configuration needs to be performed in the main control chip through the operation keys.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present invention and are not limiting; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (5)
1. The utility model provides a self-power multiparameter water quality monitor based on NB-IOT which characterized in that: the intelligent water quality control system comprises a main control chip, an NB-IOT communication module, a multi-parameter water quality detection module and a self-powered device for providing power, wherein the main control chip is respectively connected with the NB-IOT communication module and the multi-parameter water quality detection module;
The NB-IOT communication module is used for data transmission between the main control chip and the cloud;
the main control chip outputs a parameter detection instruction to the multi-parameter water quality detection module according to an operation instruction sent by the cloud end and received by the NB-IOT communication module, processes a water quality detection result returned by the multi-parameter water quality detection module and uploads the water quality detection result to the cloud end through the NB-IOT communication module;
The multi-parameter water quality detection module comprises a wide spectrum detection unit, a plurality of single water quality parameter sensors and a sensor selection module, wherein the wide spectrum detection unit is connected with the main control chip and is used for detecting four water quality parameters of chromaticity, turbidity, total organic carbon TOC and chemical oxygen demand of a water body according to a parameter detection instruction sent by the main control chip; the sensor selection module is respectively connected with the main control chip and the plurality of single water quality parameter sensors, and controls the corresponding single water quality parameter sensors to perform water quality detection according to the parameter detection instruction sent by the main control chip;
The self-powered device comprises a vibration power generation unit, a solar power generation unit, a modulation unit, a rectification circuit, a battery and a power supply management unit, wherein the modulation unit modulates alternating currents generated by the vibration power generation unit and the solar power generation unit into preset voltages respectively and simultaneously charges the battery through the rectification circuit; the battery provides power outwards through the power supply management unit; the alternating current output by the vibration power generation unit and the alternating current output by the solar power generation unit are changed into alternating current with consistent frequency, amplitude and phase after being modulated by the modulation unit;
The wide spectrum detection unit comprises a multispectral LED light source, a first collimating lens, a detection pool filled with a water body to be detected, a second collimating lens and a photoelectric detector, wherein the photoelectric detector comprises a plurality of photosensitive LEDs, the multispectral LED light source comprises a digital switch and a plurality of single-band narrow-band LED light sources which are respectively connected with the digital switch, the digital switch is also connected with the self-powered device, and the multispectral LED light sources of the plurality of single-band narrow-band LED light sources are driven to emit multispectral LED light according to parameter detection instructions sent by the main control chip; the multispectral LED light irradiates on a water body to be detected in the detection pool through the first collimating lens, and irradiates on a plurality of photosensitive LEDs through the second collimating lens after being absorbed by the water body to be detected so as to detect the light absorbance of the water sample to be detected in the detection pool; the main control chip obtains four water quality parameters of chromaticity, turbidity, total organic carbon TOC and chemical oxygen demand of the water body according to the light absorbance of the water sample to be detected in the detection tank;
The master control chip is an MSP430 series chip of TI, the sensor selection module is 2 74HC4052 chips, a P0_2 pin of the MSP430 series chip is connected with a UART1_RX pin of the NB-IOT communication module, a P0_3 pin of the MSP430 series chip is connected with a UART1_TX pin of the NB-IOT communication module, a P0_4 pin of the MSP430 series chip is connected with a RST_NB pin of the NB-IOT communication module, a P0_5 pin of the MSP430 series chip is connected with a RING pin of the NB-IOT communication module, and a P0_7 pin of the MSP430 series chip is connected with a reference voltage VREF;
The P1_2 pin of the MSP430 series chip is connected with the INH pin of one 74HC4052 chip, the P1_3 pin of the MSP430 series chip is connected with the INH pin of the other 74HC4052 chip, the P1_4 pin of the MSP430 series chip is respectively connected with the B pins of 2 74HC4052 chips, the P1_5 pin of the MSP430 series chip is respectively connected with the A pins of 2 74HC4052 chips, the P1_6 pin of the MSP430 series chip is respectively connected with the X pins of 2 74HC4052 chips, and the P1_7 pin of the MSP430 series chip is respectively connected with the Y pins of 2 74HC4052 chips; the X0 pin-X2 pin and the Y0 pin-Y2 pin of the 2 74HC4052 chips form 6 pairs of read-write control pins, and the MSP430 series chips for respectively controlling a plurality of single water quality parameter sensors to perform water quality detection and uploading water quality detection results to the TI;
the main control chip is communicated with an external handheld terminal through the Bluetooth communication unit.
2. The NB-IOT based self-powered multi-parameter water quality monitor of claim 1, wherein: the system comprises a plurality of single water quality parameter sensors, a temperature sensor, a PH value sensor, a dissolved oxygen sensor, a conductivity sensor, a turbidity sensor, an ammonia nitrogen sensor and a water quality hardness sensor, wherein the temperature sensor is used for measuring the temperature of a water body, the PH value sensor is used for measuring the PH value in the water body, the dissolved oxygen sensor is used for measuring the dissolved oxygen rate in the water body, the conductivity sensor is used for measuring the conductivity in the water body, and the turbidity sensor is used for measuring the turbidity of the water body; the ammonia nitrogen sensor is used for measuring the ammonia nitrogen concentration in the water body; the water hardness sensor is used for measuring the water hardness in the water body.
3. The NB-IOT based self-powered multi-parameter water quality monitor of claim 2, wherein: the side wall of the detection tank, which is parallel to the multispectral LED light rays, is also provided with a water inlet and a water outlet respectively, the water inlet is connected with a water inlet pipe, and the water outlet is connected with a water outlet pipe.
4. The NB-IOT based self-powered multi-parameter water quality monitor in accordance with claim 3, wherein: the main control chip is communicated with an external handheld terminal through the Bluetooth communication unit.
5. The NB-IOT based self-powered multi-parameter water quality monitor according to claim 4, wherein: the system also comprises operation keys for parameter configuration and a display screen for displaying the running parameters of the self-powered multi-parameter water quality monitor.
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| CN110441487A (en) * | 2018-05-04 | 2019-11-12 | 杭州钧工机器人科技有限公司 | Water quality monitoring system and operating method based on NB-IOT |
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