Water quality on-line monitoring comprehensive device

Abstract

The utility model discloses a water quality on-line monitoring comprehensive device, which belongs to the technical field of water resource monitoring and monitors related water quality state data information in a water body in real time through an electrochemical sensor, a glass electrode pH sensor, a photometer, an ion chromatograph, a light scattering turbidimeter and a time recorder, the related water quality state data information comprises the dissolved oxygen concentration, the pH value, the chloride concentration, the nitrate concentration, the turbidity and the ammonia nitrogen density in the actually measured water body; related water quality state data information in the water body is monitored in real time, timely and accurate monitoring feedback can be provided, continuous mastering of the environment state is ensured through the real-time performance, and emergencies are effectively prevented; the preprocessing process enables data to be more standardized, and higher accuracy and reliability are provided for subsequent water quality state analysis and prediction.

Description

Technical Field

[0001] This utility model belongs to the field of water resources monitoring technology, and in particular relates to an integrated device for online water quality monitoring. Background Technology

[0002] In modern environmental monitoring technology, the Internet of Things (IoT) is rapidly developing and being widely used as an important application area. The core of IoT technology is to connect various sensors and devices through networks to achieve real-time data collection and remote monitoring. This technology is particularly crucial in environmental protection and resource management, especially in the field of water monitoring.

[0003] Although traditional water monitoring methods can provide information on the health status of water bodies to some extent, their limitations remain significant.

[0004] First, traditional methods often suffer from data acquisition delays and insufficient real-time performance, failing to reflect rapid changes in the aquatic environment in a timely manner and making it difficult to respond quickly, thus affecting the protection and management of aquatic ecosystems.

[0005] Secondly, traditional methods usually rely on manual sampling and laboratory analysis, which is cumbersome and costly, not only inefficient but also difficult to reflect the dynamic changes in the water body in real time. Utility Model Content

[0006] The purpose of this invention is to address the deficiencies and shortcomings of existing technologies by providing a comprehensive online water quality monitoring device that can monitor relevant water quality status data in real time, thus solving the problems mentioned in the background.

[0007] To solve the above-mentioned technical problems, this utility model adopts the following technical solution.

[0008] The integrated online water quality monitoring device includes a data acquisition and monitoring module for detecting water quality status data within a water body. This data acquisition and monitoring module comprises an electrochemical sensor, a glass electrode pH sensor, a photometer, an ion chromatograph, a light scattering turbidimeter, a time recorder, a multiplexer, a data preprocessing module, an analog-to-digital converter, a microcontroller module, a data transmission module, a data storage module, a crystal oscillator module, a command input module, an alarm circuit, and a power supply module. The outputs of the electrochemical sensor, glass electrode pH sensor, photometer, ion chromatograph, and light scattering turbidimeter are connected to the input of the data preprocessing module via a multiplexer. The output of the data preprocessing module is connected to the input of the microcontroller module. The data transmission module, data storage module, crystal oscillator module, command input module, alarm circuit, and power supply module are all connected to the microcontroller module.

[0009] As a further preferred embodiment of the integrated online water quality monitoring device of this utility model, the power module includes a solar photovoltaic panel, an anti-backflow voltage stabilizing circuit, a storage battery, and a power detection module. The solar photovoltaic panel is connected to the storage battery through the anti-backflow voltage stabilizing circuit, the power detection module is connected to the storage battery, and the storage battery is connected to the microcontroller module.

[0010] As a further preferred embodiment of the integrated online water quality monitoring device of this utility model, the microcontroller module adopts the STM32F407VET6 chip, which is a high-performance, low-power 32-bit microcontroller based on the RM Cortex-M4 core, integrating 512KB of on-chip Flash and 192KB of on-chip RAM.

[0011] As a further preferred embodiment of the integrated online water quality monitoring device of this utility model, the anti-backflow voltage stabilizing circuit includes a voltage input Vin terminal, capacitors C1 and C2, a chip LM2596, an inductor L1, diodes D3 and D4, and a voltage output Vout terminal. The voltage input Vin terminal is connected to one end of capacitor C1 and the +VIN pin of chip LM2596, the other end of capacitor C1 is grounded, the GND pin of chip LM2596 is grounded, the ON / OFF pin of chip LM2596 is grounded, the OUTPUT pin of chip LM2596 is connected to one end of inductor L1 and the cathode of diode D3, the FEEDBACK pin of chip LM2596 is connected to the other end of inductor L1, the anode of diode D4, and one end of capacitor C2, the other end of capacitor C2 is grounded, the anode of diode D3 is grounded, and the cathode of diode D4 is connected to the voltage output Vout terminal.

[0012] As a further preferred embodiment of the integrated online water quality monitoring device of this utility model, the data preprocessing module includes an amplifier circuit and a dual operational amplifier bandpass filter. The amplifier circuit consists of an OPA277 operational amplifier and resistors and capacitors, and the dual operational bandpass filter consists of two OPA277 operational amplifiers.

[0013] As a further preferred embodiment of the integrated online water quality monitoring device of this utility model, the chip model of the data transmission module is nRF905.

[0014] As a further preferred embodiment of the integrated online water quality monitoring device of this utility model, the chip model of the multiplexer is AMC4601.

[0015] As a further preferred embodiment of the integrated online water quality monitoring device of this utility model, the analog-to-digital conversion module adopts the AD7794 analog-to-digital converter.

[0016] As a further preferred embodiment of the integrated online water quality monitoring device of this utility model, the crystal oscillator module includes a control chip 7N10.000MBP, a capacitor C45, resistors R22, R23, and R24, a capacitor C69, and a voltage VCC terminal. The 8th interface of the control chip 7N10.000MBP is connected to one end of the resistor R22. The other end of the resistor R22 is connected to one end of the capacitor C45, the 9th interface of the control chip 7N10.000MBP, one end of the resistor R23, and the voltage VCC terminal. The other end of the capacitor C45 is grounded. The other end of the resistor R23 is connected to one end of the resistor R24, and the other end of the resistor R24 ​​is grounded. The 10th interface of the control chip 7N10.000MBP is connected to one end of the capacitor C69, and the other end of the capacitor C69 is grounded.

[0017] Compared with the prior art, the present invention, by adopting the above technical solution, has the following technical effects:

[0018] This utility model's integrated online water quality monitoring device uses an electrochemical sensor, a glass electrode pH sensor, a photometer, an ion chromatograph, a light scattering turbidimeter, and a time recorder to monitor relevant water quality data in real time. This data includes measured dissolved oxygen concentration, pH, chloride concentration, nitrate concentration, turbidity, and ammonia nitrogen density. Real-time monitoring provides timely and accurate feedback, ensuring continuous monitoring of environmental conditions and effectively preventing emergencies. This pre-processing process standardizes the data, providing higher accuracy and reliability for subsequent water quality analysis and prediction. The entire system not only improves monitoring efficiency and reduces the time and cost of human intervention but also enhances the management and maintenance capabilities of the water environment, thereby ensuring the health and ecological balance of the water body. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the data acquisition and monitoring module of this utility model;

[0020] Figure 2 This is a schematic diagram of the power module structure of this utility model;

[0021] Figure 3 This is the circuit diagram of the anti-reverse current voltage regulator circuit of this utility model;

[0022] Figure 4 This is the circuit diagram of the power detection module of this utility model;

[0023] Figure 5 This is a circuit diagram of the data preprocessing module of this utility model;

[0024] Figure 6This is a circuit diagram of the data transmission module of this utility model;

[0025] Figure 7 This is the circuit diagram of the crystal oscillator module of this utility model. Detailed Implementation

[0026] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings:

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] The integrated online water quality monitoring device includes a data acquisition and monitoring module for detecting water quality status data within the water body; such as... Figure 1 As shown, the data acquisition and monitoring module includes an electrochemical sensor, a glass electrode pH sensor, a photometer, an ion chromatograph, a light scattering turbidimeter, a time recorder, a multiplexer, a data preprocessing module, an analog-to-digital converter, a microcontroller module, a data transmission module, a data storage module, a crystal oscillator module, a command input module, an alarm circuit, and a power supply module. The outputs of the electrochemical sensor, glass electrode pH sensor, photometer, ion chromatograph, and light scattering turbidimeter are connected to the input of the data preprocessing module via the multiplexer. The output of the data preprocessing module is connected to the input of the microcontroller module. The data transmission module, data storage module, crystal oscillator module, command input module, alarm circuit, and power supply module are all connected to the microcontroller module.

[0029] This utility model's integrated online water quality monitoring device uses an electrochemical sensor, a glass electrode pH sensor, a photometer, an ion chromatograph, a light scattering turbidimeter, and a time recorder to monitor relevant water quality data in real time. This data includes measured dissolved oxygen concentration, pH, chloride concentration, nitrate concentration, turbidity, and ammonia nitrogen density. Real-time monitoring provides timely and accurate feedback, ensuring continuous monitoring of environmental conditions and effectively preventing emergencies. This pre-processing process standardizes the data, providing higher accuracy and reliability for subsequent water quality analysis and prediction. The entire system not only improves monitoring efficiency and reduces the time and cost of human intervention but also enhances the management and maintenance capabilities of the water environment, thereby ensuring the health and ecological balance of the water body.

[0030] like Figure 2 As shown, the power module includes a solar photovoltaic panel, an anti-reverse current voltage regulator circuit, a battery, and a power detection module. The solar photovoltaic panel is connected to the battery via the anti-reverse current voltage regulator circuit, the power detection module is connected to the battery, and the battery is connected to the microcontroller module.

[0031] The microcontroller module uses the STM32F407VET6 chip, which is a high-performance, low-power 32-bit microcontroller based on the RM Cortex-M4 core, integrating 512KB of on-chip Flash and 192KB of on-chip RAM.

[0032] like Figure 3 As shown, the anti-reverse current voltage regulator circuit includes a voltage input Vin terminal, capacitors C1 and C2, an LM2596 chip, an inductor L1, diodes D3 and D4, and a voltage output Vout terminal. The voltage input Vin terminal is connected to one end of capacitor C1 and the +VIN pin of the LM2596 chip. The other end of capacitor C1 is grounded. The GND pin and ON / OFF pin of the LM2596 chip are grounded. The OUTPUT pin of the LM2596 chip is connected to one end of inductor L1 and the cathode of diode D3. The FEEDBACK pin of the LM2596 chip is connected to the other end of inductor L1, the anode of diode D4, and one end of capacitor C2. The other end of capacitor C2 is grounded. The anode of diode D3 is grounded. The cathode of diode D4 is connected to the voltage output Vout terminal. The circuit diagram of the power detection module is shown below. Figure 4 As shown.

[0033] like Figure 3 As shown, capacitors C1 and C2 are filter capacitors, ferrite bead L1 is used to correct voltage fluctuations at the output terminal, diode D4 prevents reverse current, and a fast charging method is adopted. Two 12V DC lead-acid batteries with a capacity of 75Ah are charged in stages (these batteries do not have problems such as acid mist volatilization, can be deeply discharged to 0V, and can be recharged to restore full rated capacity). To achieve fast charging and considering the conversion efficiency of solar photovoltaic panels, 18V 330W foldable photovoltaic panels are selected; and the wind turbine is a micro motor with a rated power of 85W and a rated DC voltage and current of 12V / 4.4A.

[0034] To prevent the 75Ah battery from being too high or too low and affecting normal operation, this invention incorporates a battery voltage measurement circuit to monitor the battery level in real time. If the level is too high, the solar and wind power supply is cut off; if one battery is too low, the other battery provides power alternately in real time.

[0035] To prevent the 75Ah battery from being overcharged or undercharged and thus affecting normal operation, this invention incorporates a battery voltage measurement circuit to monitor the battery level in real time. If the level is too high, the solar power is cut off; if one battery is undercharged, the other battery provides alternating power in real time. The circuit design is as follows: Figure 4 As shown, resistors R1 and R2 divide the voltage in the circuit. Point A is connected to the PA0 serial port of the controller. The analog quantity K is measured by ADC conversion. The system automatically calculates the battery voltage value and makes a judgment according to the following formula.

[0036] Where is the voltage value of the battery, and is the voltage value at point A of the battery voltage measurement circuit.

[0037] like Figure 5 As shown, the data preprocessing module includes an amplifier circuit and a dual op-amp bandpass filter. The amplifier circuit consists of an OPA277 operational amplifier and resistors and capacitors, and the dual op-amp bandpass filter consists of two OPA277 operational amplifiers.

[0038] A multiplexed analog switch is used to select and output data in a time-division manner to the subsequent data preprocessing module. Data from the electrochemical sensor, glass electrode pH sensor, photometer, ion chromatograph, and light scattering turbidimeter are amplified and filtered before being input to the signal conversion circuit, greatly reducing signal noise and signal loss during measurement. The amplification circuit consists of an OPA277 operational amplifier and resistors and capacitors, forming a typical differential amplifier circuit. C3 and R6, and C4 and R7 form a low-pass filter. Two OPA277 operational amplifiers form a dual op-amp bandpass filter. The Q value and center frequency of this bandpass filter are adjustable; adjusting R9 adjusts the resonant frequency, and adjusting R8 adjusts the Q value. After acquisition, the multiplexed analog switch selects the output to the signal processing circuit, which then inputs it to the AD7794 for digital-to-analog conversion, converting the analog signal into a digital signal, which is beneficial for long-distance wireless signal transmission.

[0039] like Figure 6As shown, the data transmission module uses the nRF905 chip. This invention employs the nRF905, a long-range wireless transceiver chip with multiple transmitting points, long transmission distance, and strong anti-interference capabilities. It operates in three ISM bands: 433 / 868 / 915MHz, with a switching time between transmit and receive modes of less than 650µs. Ports TRX_CE, PWR_UP, TXEN, CSN, SCK, MISO, and MOSI are connected to the microcontroller. CSN, SCK, MISO, and MOSI form an SPI interface. When transmitting data, the nRF905 is set to transmit mode. The microcontroller writes the receiver address and valid data into the chip's buffer via the SPI interface, then generates a CRC and preamble using the TRX_CE level, and transmits the data. When receiving data, the nRF905 is set to receive mode, waiting for data arrival. Upon receiving the preamble, valid address, and CRC, the data is stored in a register, generating an interrupt for the microcontroller to read.

[0040] The multiplexing switch uses an AMC4601 chip.

[0041] The analog-to-digital conversion module uses the AD7794 analog-to-digital converter.

[0042] like Figure 7 As shown, the crystal oscillator module includes a control chip 7N10.000MBP, a capacitor C45, resistors R22, R23, and R24, a capacitor C69, and a voltage VCC terminal. The 8-pin connector of the control chip 7N10.000MBP is connected to one end of resistor R22. The other end of resistor R22 is connected to one end of capacitor C45, the 9-pin connector of the control chip 7N10.000MBP, one end of resistor R23, and the voltage VCC terminal. The other end of capacitor C45 is grounded. The other end of resistor R23 is connected to one end of resistor R24, and the other end of resistor R24 ​​is grounded. The 10-pin connector of the control chip 7N10.000MBP is connected to one end of capacitor C69, and the other end of capacitor C69 is grounded.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An on-line monitoring integrated device for water quality, characterized in that: The application discloses a data acquisition and monitoring module for detecting water quality state data information in a water body.

2. The water quality on-line monitoring integrated device according to claim 1, characterized in that: The power module comprises a solar photovoltaic panel, an anti-backflow voltage stabilizing circuit, a storage battery and an electric quantity detection module; the solar photovoltaic panel is connected with the storage battery through the anti-backflow voltage stabilizing circuit; the electric quantity detection module is connected with the storage battery; and the storage battery is connected with the microcontroller module.

3. The water quality on-line monitoring integrated device according to claim 1, characterized in that: The microcontroller module adopts an STM32F407VET6 chip which is a 32-bit microcontroller based on an RM Cortex-M4 core, has a high performance and low power consumption, and is integrated with a 512 KB on-chip flash and a 192 KB on-chip RAM.

4. The water quality on-line monitoring integrated device according to claim 2, characterized in that: The anti-backflow voltage stabilizing circuit comprises a voltage input Vin end, a capacitor C1, a capacitor C2, a chip LM2596, an inductor L1, a diode D3, a diode D4 and a voltage output Vout end; the voltage input Vin end is connected with one end of the capacitor C1 and a +VIN pin of the chip LM2596 respectively; the other end of the capacitor C1 is grounded; a GND pin of the chip LM2596 is grounded; an ON / OFF pin of the chip LM2596 is grounded; an OUTPUT pin of the chip LM2596 is connected with one end of the inductor L1 and a cathode of the diode D3 respectively; a FEEDBACK pin of the chip LM2596 is connected with the other end of the inductor L1, an anode of the diode D4 and one end of the capacitor C2 respectively; the other end of the capacitor C2 is grounded; an anode of the diode D3 is grounded; and a cathode of the diode D4 is connected with the voltage output Vout end.

5. The water quality on-line monitoring integrated device according to claim 1, characterized in that: The data preprocessing module comprises an amplification circuit and a double-operational-amplifier band-pass filter; the amplification circuit is composed of an OPA277 operational amplifier and resistors and capacitors; and the double-operational-amplifier band-pass filter is composed of two OPA277 operational amplifiers.

6. The water quality on-line monitoring integrated device according to claim 1, characterized in that: The chip type of the data transmission module is nRF905.

7. The water quality on-line monitoring integrated device according to claim 1, characterized in that: The chip type of the multiplexing switch is AMC4601.

8. The water quality on-line monitoring integrated device according to claim 1, characterized in that: The analog-digital conversion module adopts an AD7794 analog-digital converter.

9. The water quality on-line monitoring integrated device according to claim 1, characterized in that: The crystal oscillator module comprises a control chip 7N10.000MBP, a capacitor C45, a resistor R22, a resistor R23, a resistor R24, a capacitor C69 and a voltage VCC terminal, one end of the resistor R22 is connected to the 8 interface of the control chip 7N10.000MBP, the other end of the resistor R22 is respectively connected to one end of the capacitor C45, the 9 interface of the control chip 7N10.000MBP, one end of the resistor R23 and the voltage VCC terminal, the other end of the capacitor C45 is grounded, the other end of the resistor R23 is connected to one end of the resistor R24, the other end of the resistor R24 is grounded, one end of the capacitor C69 is connected to the 10 interface of the control chip 7N10.000MBP, and the other end of the capacitor C69 is grounded.

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