Multi-power water quality monitor

Abstract

The utility model discloses a multi-power water quality monitor which comprises a processor, a multi-source power supply module connected with the processor, a wireless transceiving module in bidirectional connection with the processor, and a monitoring module connected with the wireless transceiving module, the power supply management module is connected with the processor and is used for controlling the multi-source power supply module to perform power supply switching; the multi-source power supply module comprises a USB power supply module, a solar power supply module and a 220V AC power supply module. According to the utility model, the water quality monitor can be flexibly deployed in an area with a small power supply coverage area, and the cruising ability of the water quality monitor can be ensured by matching solar power supply and regular replacement of a USB external power supply, so that the water quality monitor can stably operate for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality monitors, and particularly relates to a multi-power water quality monitor. Background Art

[0002] In the field of environmental monitoring technology, especially in the sub-field of water quality monitoring, water quality monitors are one of the core devices, which are used to monitor and analyze various chemical and physical parameters in water bodies in real time, such as temperature, pH value, dissolved oxygen, turbidity, etc. Water quality monitors play a crucial role in the fields of environmental governance, water resource management, sewage treatment, etc.

[0003] Most traditional water quality monitors are designed to rely on 220V AC power. Although this design is relatively convenient to use in areas such as cities and industrial zones, in nature reserves, remote villages with small power grid coverage, or in scenarios of monitoring flowing water bodies, traditional water quality monitor devices cannot meet the requirements of flexible deployment and long-term monitoring, and cannot operate stably.

[0004] Therefore, it is an urgent problem to be solved at present to provide a water quality monitor that can be flexibly deployed in an environment lacking conventional power, can operate for a long time, and can operate stably. Summary of the Utility Model

[0005] The purpose of the utility model is to propose a multi-power water quality monitor to solve the problem that the existing water quality monitor in the background art relies too much on 220V AC power, resulting in the inability to flexibly deploy the water quality monitor in scenarios with small power grid coverage or flowing water body monitoring, and the deployed water quality monitor cannot operate stably for a long time.

[0006] To achieve the above purpose, the utility model proposes a multi-power water quality monitor, including a processor, a multi-source power supply module connected to the processor, a wireless transceiver module bidirectionally connected to the processor, a monitoring module connected to the wireless transceiver module, and a power management module connected to the processor for controlling the power supply module to switch power sources; the multi-source power supply module includes a USB power supply module, a solar power supply module, and a 220V AC power supply module.

[0007] Optionally, the power management module includes a first automatic control switch arranged at the output end of the USB power supply module, a DC current sensor connected to the solar power supply module, a second automatic control switch arranged at the output end of the solar power supply module, an AC voltage sensor connected to the 220V AC power supply module, and a third automatic control switch arranged at the output end of the 220V AC power supply module; the first automatic control switch, the second automatic control switch, and the third automatic control switch are connected to the processor.

[0008] Optionally, the USB power supply module includes a USB interface for connecting to an external USB power supply, a boost converter connected to the USB interface, and the boost converter is connected to the processor, the wireless transceiver module, and the monitoring module through a first automatic control switch for power supply; both the solar power supply module and the 220V AC power supply module are connected with a buck-boost converter.

[0009] Optionally, the USB interface is further connected with a data transmission line, and the data transmission line is connected to the processor.

[0010] Optionally, the solar power supply module includes a photovoltaic module and a battery pack connected to the photovoltaic module. The battery pack is connected to the processor, the wireless transceiver module, and the monitoring module through a buck-boost converter for power supply, and the battery pack is connected to a DC current sensor.

[0011] Optionally, the 220V AC power supply module includes an AC interface for connecting to an external 220V AC power supply, a rectifier connected to the AC interface, and the output end of the rectifier is connected to the input end of the buck-boost converter. The AC interface is connected to an AC voltage sensor.

[0012] Optionally, the monitoring module includes a pH sensor, a temperature sensor, a turbidity sensor, a dissolved oxygen sensor, and a conductivity sensor connected to the processor.

[0013] Optionally, the wireless transceiver module includes an antenna, a radio frequency front end bidirectionally connected to the antenna, an intermediate frequency amplifier connected to the radio frequency front end, and a modulator-demodulator connected to the intermediate frequency amplifier and the radio frequency front end. The modulator-demodulator is also connected to the processor.

[0014] Compared with the prior art, the present utility model provides a multi-power water quality monitor, which has the following beneficial effects:

[0015] Through the setting of the multi-power module and in cooperation with the power management module, the power supply of the entire water quality monitor can be switched at any time. The water quality monitor can select among a 220V power supply, a USB external power supply, and solar power supply, without being affected by the power grid. Even in areas with a small power supply coverage, when the water quality monitor is installed at a location where it cannot be connected to a 220V power supply, it can be powered by both the USB external power supply and solar power supply, enabling the water quality monitor to be flexibly deployed. Moreover, it can cooperate with solar power supply and regular replacement of the USB external power supply to ensure the battery life of the water quality monitor, enabling the water quality monitor to operate stably for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is the module block diagram of the whole utility model.

[0017] Figure 2 It is the module block diagram among the multi-power module, power management module and processor of the utility model.

[0018] Figure 3 It is the module block diagram of the wireless transceiver module and processor of the utility model.

[0019] Figure 4 It is the module block diagram of the processor and monitoring module of the utility model.

[0020] Figure 5 It is the circuit structure schematic diagram of the boost converter of the utility model.

[0021] Figure 6 It is the circuit structure schematic diagram of the charging controller of the utility model.

[0022] Figure 7 It is the circuit structure schematic diagram of the buck-boost converter of the utility model.

[0023] Figure 8 It is the switch diagram inside the chip of the buck-boost converter of the utility model.

[0024] Figure 9 It is the circuit structure schematic diagram of the inverter of the utility model.

[0025] Identifications in the figure: 1. Processor; 2. Multi-source power supply module; 21. USB power supply module; 211. USB interface; 212. Boost converter; 22. Solar power supply module; 221. Photovoltaic module; 222. Battery pack; 223. Charging controller; 23. 220V AC power supply module; 231. AC interface; 232. Rectifier; 24. Buck-boost converter; 25. Inverter; 3. Wireless transceiver module; 31. Antenna; 32. RF front end; 33. Intermediate frequency amplifier; 34. Modulator-demodulator; 4. Monitoring module; 41. pH sensor; 42. Temperature sensor; 43. Turbidity sensor; 44. Dissolved oxygen sensor; 45. Conductivity sensor; 5. Power management module; 51. First automatic control switch; 52. Second automatic control switch; 53. Third automatic control switch; 54. DC current sensor; 55. AC voltage sensor. Detailed implementation manners

[0026] The following is a detailed description in combination with the accompanying drawings and specific implementations. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0027] A multi-power water quality monitor of the present application can be applicable to occasions such as environments lacking conventional power supplies, and of course can also be used in other similar application scenarios. A multi-power water quality monitor will be described in detail below.

[0028] Refer to the attached Figure 1 — Figure 9 As shown, a structural schematic diagram of a preferred embodiment of a multi-power water quality monitor of the present application is shown. A multi-power water quality monitor includes a processor 1, a multi-power supply module 2 connected to the processor 1, a wireless transceiver module 3 connected to the processor 1 bidirectionally, a monitoring module 4 connected to the wireless transceiver module 3, and a power management module 5 connected to the processor 1 for controlling the power supply module 2 to switch power supplies; among them, the multi-power supply module 2 includes a USB power supply module 21, a solar power supply module 22, and a 220V AC power supply module 23. It should be particularly noted that the processor 1 can be a single-chip microcomputer.

[0029] With the setting of the multi-source power supply module 2 of the present utility model, the water quality monitor can be powered by multiple power sources to ensure its normal operation. Specifically, the 220V AC power supply module 23 is used when the water quality monitor is deployed in a location where the power grid is well-developed and a 220V AC power source can be directly or conveniently connected. The conventional AC power source can directly provide a stable voltage to ensure the normal operation of the water quality monitor. The USB power supply module 21 and the solar power supply module 22 enable the water quality monitor to operate normally when the power grid deployment is not perfect and a stable conventional power source cannot be provided, or when the 220V AC power source cannot be powered due to special reasons such as maintenance or disasters, ensuring that the water quality monitor can operate normally. Moreover, the solar power supply module 22 belongs to renewable energy and can provide a relatively stable power source for the water quality monitor. The USB power supply module 21 can provide emergency power when the solar power supply module 22 is insufficient, and the stability of the multi-source power supply module 2 can be further improved by regularly replacing the external mobile power source connected to the USB power supply module 21, ensuring that the water quality monitor can operate stably for a long time. In addition, the USB power supply module 21 can transmit data with an external controller, enabling the selection of wireless transmission and wired transmission according to actual needs. With the setting of the wireless transceiver module 3, it can be used for remote transmission of water quality monitoring results. With the setting of the monitoring module 4, the water quality can be monitored in real time, facilitating the improvement of the improvement effect when improving the water quality. With the setting of the power management module 5, it can select according to the power sources connected in the multi-source power supply module 2. Specifically, when the 220V AC power supply module 23 can supply power, the power management module 5 preferentially selects the 220V AC power supply module 23 for power supply. If the 220V AC power supply module 23 cannot supply power, the solar power supply module 22 is selected for power supply. If neither the 220V AC power supply module 23 nor the solar power supply module 22 can provide stable power, the USB power supply module 21 is used for power supply. Through the priority selection of the power modules by the power management module 5, the situation of multiple power modules supplying power simultaneously or no power module supplying power is avoided.

[0030] Refer to the appendix Figure 1 and Figure 2As shown, in the present utility model, the power management module 5 includes a first automatic control switch 51 disposed at the output end of the USB power supply module 21, a DC current sensor 54 connected to the solar power supply module 22, a second automatic control switch 52 disposed at the output end of the solar power supply module 22, an AC voltage sensor 55 connected to the 220V AC power supply module 23, and a third automatic control switch 53 disposed at the output end of the 220V AC power supply module 23. Among them, the first automatic control switch 51, the second automatic control switch 52, the third automatic control switch 53, the DC current sensor 54, and the AC voltage sensor 55 are all connected to the processor 1.

[0031] Through the setting of the three automatic control switches in the present utility model, the processor 1 can respectively control the connection and disconnection of the three power supply modules, namely the USB power supply module 21, the solar power supply module 22, and the 220V AC power supply module 23, avoiding the situation of simultaneous power supply by multiple power sources and the inability to cut off the power supply module. Through the setting of the DC current sensor 54, it is used to sense the current situation in the solar power supply module 22 and monitor the electric energy stored in the solar power supply module 22. Ensure that when the solar power supply module 22 can supply power, the first automatic control switch 51 is disconnected to cut off the USB power supply module 21, ensuring that only a single power supply module supplies power. Through the setting of the AC voltage sensor 55, it is used to monitor whether the 220V AC power supply is connected. When it is detected that the 220V power supply is connected, a signal is sent to the processor 1 to make the processor 1 control the first automatic control switch 51 and the second automatic control switch 52 to disconnect, ensuring that only the 220V AC power supply module 23 supplies power.

[0032] Refer to the appendix Figure 2 and Figure 5 As shown, in the present utility model, the USB power supply module 21 includes a USB interface 211 for connecting to an external USB power supply, a boost converter 212 connected to the USB interface 211, and the boost converter 212 is connected to the processor 1, the wireless transceiver module 3, and the monitoring module 4 through the first automatic control switch 51 for power supply. Both the solar power supply module 22 and the 220V AC power supply module 23 are connected with a buck-boost converter 24. The USB interface 211 is also connected with a data transmission line, and the data transmission line is connected to the processor 1.

[0033] It should be noted specifically that Figure 5The working principle of the circuit of the boost converter 212 is the same as that of the existing boost circuit. The main chip of its circuit is the existing SDB628, which can control the current to charge and discharge the inductor, thereby boosting the voltage. Briefly speaking, when the switch control pin of the SDB628 controls the switch to close, the inductor is charged, and the capacitor supplies power to the load to maintain the output voltage. When the switch control pin controls the switch to open, the inductor will release current due to its own characteristics and supply power to the capacitor and the load. The current of the capacitor and the current of the inductor cooperate to increase the voltage at the output end. The SDB628 chip is a boost converter chip widely used in the field of power management. The input voltage range of this chip can be from a minimum of 2 volts to a maximum of 24 volts, and the maximum boost can reach 28 volts and is adjustable. It also integrates a MOSFET (metal-oxide-semiconductor field-effect transistor) with an internal RDS internal resistance of 100 milliohms. The maximum output current can reach 2A, the operating frequency is 1.2MHZ, and the conversion efficiency is as high as 95%. At the same time, this circuit has functions such as short-circuit protection and overheat protection. This principle belongs to the existing boost principle, so it will not be elaborated here.

[0034] Through the setting of the USB interface 211, the present utility model provides a connection basis for the USB mobile power supply to ensure that an external power supply can be connected; through the setting of the boost converter 212, the external mobile power supply can be boosted and stabilized to provide a stable voltage for the processor 1 and the monitoring module 4; through the setting of the buck-boost converter 24, the electric energy can be efficiently converted, the waste of electric energy can be reduced, the energy utilization rate can be improved, and the service life of the battery pack 222 in the solar power supply module 22 can be extended; through the setting of the data transmission line, the data transmission line and the USB power line are distinguished, so that when the USB power line is disconnected, it does not affect the data transmission through the USB interface.

[0035] Refer to the appendix Figure 2 、 Figure 6 and Figure 7 As shown in the appendix, in the present utility model, the solar power supply module 22 includes a photovoltaic module 221 and a battery pack 222 connected to the photovoltaic module 221. The battery pack 222 is connected to the processor 1, the wireless transceiver module 3, and the monitoring module 4 through the buck-boost converter 24 for power supply, and the battery pack 222 is connected to the DC current sensor 54. It should be noted that the automatic control switch retains the function of manual control, and the switching speed during automatic switching is in milliseconds. A charging controller 223 is provided between the photovoltaic module 221 and the battery pack 222. The charging controller 223 controls the electric energy generated by the photovoltaic module 221 to charge the battery pack 222, and at the same time adjusts the voltage and current to protect the battery.

[0036] Refer to the appendix Figure 6As shown, the working principle of the charging controller 223 in this application is as follows:

[0037] When the photovoltaic module 221 receives sunlight irradiation, it generates a DC voltage and stores it in the battery pack 222. The charging controller 223 monitors the voltage and current of the battery pack 222 in real time through the internal voltage and current detection circuits, and manages them through the control chip CN3791.

[0038] Specifically, CN3791 is a PWM buck-mode single-cell lithium battery charging management integrated circuit powered by a solar panel. It has trickle, constant current, and constant voltage charging modes. When the voltage of the battery pack 222 is lower than the set value, CN3791 enters the constant current charging mode, sets the charging current through the circuit resistance, and provides a constant charging current for rapid charging. When the battery voltage gradually rises and approaches the set cut-off voltage (the constant voltage charging voltage is 4.2V ± 1%), the charging controller 223 gradually reduces the charging current and switches to the constant voltage charging mode to ensure that the battery pack is not overcharged. For deeply discharged lithium batteries, when the battery voltage is lower than 66.5% (typical value) of the constant voltage charging voltage, CN3791 performs trickle charging at 17.5% of the constant current charging current. During the constant voltage charging stage, the charging current gradually decreases, and when the charging current drops to 16% of the constant current charging current, the charging ends. If, in the charging end state, the battery voltage drops to 95.5% of the constant voltage charging voltage, CN3791 automatically starts a new charging cycle.

[0039] In addition, CN3791 also has multiple protection functions, including input low voltage lockout, overvoltage protection, and charging status indication, etc. When an abnormal situation is detected (such as input power loss or input voltage lower than the battery voltage), CN3791 automatically enters the sleep mode to protect the safety of the battery pack and the entire circuit. This charging controller 223 belongs to the prior art and is briefly described here for easy understanding of the charging controller 223.

[0040] Through the setting of the photovoltaic module 221 in the present utility model, solar energy is converted, solar energy is converted into electrical energy, and the battery pack 222 is charged, so that the battery pack 222 can provide electrical energy for the processor 1 and the monitoring module 4, ensuring the normal operation of the processor 1 and the monitoring module 4, enabling the water quality monitor to operate stably and monitor the water quality; through the setting of the battery pack 222, the electrical energy converted by the photovoltaic module 221 is stored, so that when there is no sun or the solar irradiance is insufficient for the technical photovoltaic module 221, the battery pack 222 can still provide electrical energy to make the water quality monitor work, enabling the water quality detector to work even under insufficient solar illumination and ensuring the stability of the operation of the water quality monitor.

[0041] Refer to the appendix Figure 2 andFigure 7 As shown, in the present utility model, the 220V AC power supply module 23 includes an AC interface 231 for connecting to an external 220V AC power supply, a rectifier 232 connected to the AC interface 231, the output end of the rectifier 232 is connected to the input end of the buck-boost converter 24, and the AC interface 231 is connected to the AC voltage sensor 55.

[0042] Through the setting of the AC interface 231 in the present utility model, a connection position is provided for the existing conventional 220V AC power supply, enabling the water quality monitor to be connected to the 220V AC power supply for power supply; through the setting of the rectifier 232, the 220V AC power can be rectified to convert the 220V AC power into DC power, providing a voltage reduction basis for the subsequent buck-boost converter 24, enabling the 220V AC power and the solar power supply module 22 to use the same buck-boost converter 24, reducing the number of buck-boost converters 24, making the circuit more concise, and reducing production costs; by connecting the AC interface 231 to the AC voltage sensor 55, when the AC interface 231 is connected to an external 220V AC power supply, the AC voltage sensor 55 can sense it and transmit the signal to the processor 1, enabling the processor 1 to control the first automatic control switch 51 to disconnect after the AC interface 231 is connected to the 220V AC power supply.

[0043] Refer to Figure 7 and 8 As shown, the working principle of the buck-boost converter 24 is as follows:

[0044] When the input voltage is significantly greater than the output voltage, this means that the converter can supply energy to the load at the maximum duty cycle of switch A. Therefore, the converter operates in buck mode. The control signal VC-Boost is always lower than the compensation ramp because Buck can supply sufficient energy to the load. Thus, switch D is always on and switch C remains off. Meanwhile, VC-Buck is compared with the compensation ramp normally to generate a PWM signal. Therefore, switches A and B are pulse-width modulated to produce the required duty cycle to support the output voltage. When the input voltage approaches the output voltage, due to the duty cycle limitation of switch A, the converter cannot supply the required energy to the load. In this case, switch A will be on throughout the period, that is, no operation is performed on B and D (switches B and D are on simultaneously). Subsequently, a new period begins. Since there was no B and D in the previous cycle, an offset voltage is added to the ramp signal to make it easier for the ramp signal to reach VC-Buck. At the same time, due to loop regulation, VC-Boost (and VC-Buck) rises to a certain level such that the ramp signal can intersect with it to generate a PWM drive signal for Boost operation. After switch C turns off, the ramp signal continues to rise (the actual inductor current may rise or fall depending on the difference between the input voltage and the output voltage). When the ramp intersects with VC-Buck, a PWM signal for Buck operation is generated. Now the duty cycle of buck is within its limit, so there are operations on B and D in the current cycle, which means the offset voltage for the next cycle will be removed. This is the so-called buck-boost region. Due to the voltage drop across the switches causing an overloaded load, the actual input range of this region may be a bit wide. When the input voltage is significantly lower than the output voltage, the converter operates in boost mode. Even though the offset voltage is always added, the control signal VC-Buck is always higher than the compensation ramp. Therefore, switch A remains closed and switch B remains off. Meanwhile, VC-Boost is compared with the compensation ramp normally to generate a PWM signal. Therefore, switches C and D are pulse-width modulated to produce the required duty cycle to support the regulated output voltage. This buck-boost converter 24 belongs to the prior art. This application only briefly describes the working process and achieved functions of the buck-boost converter 24 without improving the existing buck-boost converter 24.

[0045] Refer to the attached Figure 2 、 Figure 3 and Figure 9 As shown, in the present utility model, the output terminals of the boost converter 212 and the boost converter 24 are also connected to an inverter 25, and the output terminal of this inverter 25 is connected to the monitoring module 4.

[0046] Refer to the attached Figure 9 As shown, the working principle of the inverter 25 in the present utility model is described as follows:

[0047] The inverter 25 mainly consists of parts such as an input filter, a rectifier filter circuit, a PWM controller, and an inverter circuit. When a DC power supply is input, it is converted into smooth DC power through the rectifier filter circuit. Then, the PWM controller adjusts the amplitude and frequency of the output voltage as needed, controls the on / off states of the switching tubes in the inverter circuit, thereby realizing the conversion from DC power to AC power. Finally, the AC power output from the inverter circuit is delivered to the load. In the inverter circuit, the on / off states of the switching tubes are controlled by the PWM controller according to the magnitude and frequency of the output voltage. By changing the on / off time of the switching tubes, the magnitude and frequency of the output voltage can be adjusted, thereby realizing the regulation of the AC power supply. It should be particularly noted that this application does not improve the inverter 25. Here, only the working principle of the inverter is simply described for the convenience of understanding the inverter 25.

[0048] With the setting of the inverter 25 in the present utility model, DC power can be converted into AC power to provide AC power for some sensors that require AC power, ensuring that all sensors can be used normally, so that the entire water quality monitor can be used normally; it should be particularly noted that in this application, only an inverter 25 is connected in parallel, and there is still DC current to provide DC power for the sensors using DC power in the monitoring module 4, thereby ensuring that all sensors can be used normally.

[0049] Refer to the appendix Figure 1 and Figure 4 As shown, in the present utility model, the monitoring module 4 includes a pH sensor 41, a temperature sensor 42, a turbidity sensor 43, a dissolved oxygen sensor 44, and a conductivity sensor 45 connected to the processor 1; with the setting of the pH sensor 41 in the present utility model, the acidity and alkalinity of the water body can be monitored; with the setting of the temperature sensor 42, the water temperature can be monitored; with the setting of the turbidity sensor 43, the turbidity of the water body can be monitored; with the setting of the dissolved oxygen sensor 44, the dissolved oxygen concentration of the water body can be monitored; with the setting of the conductivity sensor 45, the conductivity in the water body can be monitored; it should be particularly noted that the pH sensor 41, temperature sensor 42, turbidity sensor 43, dissolved oxygen sensor 44, and conductivity sensor 45 in this application can be connected to an AC power supply or a DC power supply according to actual needs.

[0050] Refer to the appendix Figure 1 and Figure 3 As shown, in the present utility model, the wireless transceiver module 3 includes an antenna 31, a radio frequency front end 32 bidirectionally connected to the antenna 31, an intermediate frequency amplifier 33 connected to the radio frequency front end 32, a modulator / demodulator 34 connected to the intermediate frequency amplifier 33 and the radio frequency front end 32, and a processor 1 connected to the modulator / demodulator 34.

[0051] The present utility model is provided with an antenna 31 for receiving and transmitting wireless signals. Specifically, it receives radio frequency signals from the air and converts them into current signals to be sent to the radio frequency front end 32, and converts the radio frequency signals output by the radio frequency front end into electromagnetic waves to be radiated into space; the radio frequency front end 32 is provided for preliminarily processing the radio frequency signals transmitted by the antenna 31, such as filtering, amplifying, etc., and amplifying the modulated radio frequency signals and then transmitting them to the antenna for emission; the intermediate frequency amplifier 33 is provided for further boosting the intermediate frequency signals to meet the demodulation requirements; the modulation and demodulation unit 34 is provided for restoring the radio frequency or intermediate frequency signals to baseband signals and for converting the baseband signals into radio frequency signals.

[0052] Refer to the attached Figure 1 — Figure 9 As shown, the working principle of the present utility model is as follows:

[0053] When the power grid coverage is wide at the location where the water quality monitor is deployed and it is very convenient to use the 220V conventional power supply, at this time, all three automatic control switches are in the closed state. At this time, connect the 220V power supply to the AC interface 231. After activating the entire water quality monitor, the AC voltage sensor 55 senses that the AC interface 231 is connected to a 220V AC power supply and transmits the signal to the processor 1. After receiving the signal, the processor 1 controls the first automatic control switch 51 and the second automatic control switch 52 to disconnect and closes the third automatic control switch 53 to supply power with the 220V AC power supply; then connect the mobile power supply through the USB interface 211.

[0054] When the power grid coverage is small at the location where the water quality monitor is deployed and it is not convenient to use the 220V conventional power supply and it is necessary to supply power in cooperation with the solar power supply module 22 and the USB power supply module 21, connect the mobile power supply to the USB interface 211. After the mobile power supply activates the entire water quality monitor, when the water quality monitor does not sense other power sources through the DC current sensor 54 and the AC voltage sensor 55, disconnect the second automatic control switch 52 and the third automatic control switch 53. If the sunlight is sufficient when using the USB power supply module 21 for power supply, the photovoltaic module 221 converts solar energy into electrical energy and stores it in the battery pack 222. When the electrical energy in the battery pack 222 is sufficient to supply power to the water quality detector, the DC current sensor 54 transmits the signal to the processor 1. After receiving the signal, the processor 1 issues an instruction to disconnect the first automatic control switch 51 and at the same time closes the second automatic control switch 52; it should be particularly noted that the time difference between the two control switches is a few milliseconds, and it does not cause the processor 1 to lose power; similarly, if the electrical energy in the battery pack 222 is insufficient, after the processor 1 receives the signal from the DC current sensor 54, it disconnects the second automatic control switch 52 and closes the first automatic control switch at the same time.

[0055] The above embodiments are illustrative of the present application and not restrictive thereof. Any solution obtained by simply transforming the present application falls within the protection scope of the present application.

Claims

1. A multi-power water quality monitor, characterized in that, It includes a processor (1), a multi-source power supply module (2) connected to the processor (1), a wireless transceiver module (3) connected bidirectionally to the processor (1), a monitoring module (4) connected to the wireless transceiver module (3), and a power management module (5) connected to the processor (1) for controlling the power supply switching of the multi-source power supply module (2); The multi-source power supply module (2) includes a USB power supply module (21), a solar power supply module (22), and a 220V AC power supply module (23).

2. The multi-power water quality monitor according to claim 1, characterized in that, The power management module (5) includes a first automatic control switch (51) arranged at the output end of the USB power supply module (21), a DC current sensor (54) connected to the solar power supply module (22), a second automatic control switch (52) arranged at the output end of the solar power supply module (22), an AC voltage sensor (55) connected to the 220V AC power supply module (23), and a third automatic control switch (53) arranged at the output end of the 220V AC power supply module (23); The first automatic control switch (51), the second automatic control switch (52), and the third automatic control switch (53) are connected to the processor (1).

3. The multi-power water quality monitor according to claim 2, characterized in that, The USB power supply module (21) includes a USB interface (211) for connecting to an external USB power supply, a boost converter (212) connected to the USB interface (211), and the boost converter (212) is connected to the processor (1), the wireless transceiver module (3), and the monitoring module (4) through the first automatic control switch (51) for power supply; both the solar power supply module (22) and the 220V AC power supply module (23) are connected with a buck-boost converter (24).

4. The multi-power water quality monitor according to claim 3, characterized in that, The USB interface (211) is also connected with a data transmission line, and the data transmission line is connected to the processor (1).

5. The multi-power water quality monitor according to claim 3, characterized in that, The solar power supply module (22) includes a photovoltaic module (221) and a battery pack (222) connected to the photovoltaic module (221), and the battery pack (222) is connected to the processor (1), the wireless transceiver module (3), and the monitoring module (4) through the buck-boost converter (24) for power supply, and the battery pack (222) is connected to the DC current sensor (54).

6. The multi-power water quality monitor according to claim 3, characterized in that, The 220V AC power supply module (23) includes an AC interface (231) for connecting to an external 220V AC power supply, a rectifier (232) connected to the AC interface (231), the output end of the rectifier (232) is connected to the input end of the buck-boost converter (24), and the AC interface (231) is connected to the AC voltage sensor (55).

7. The multi-power water quality monitor according to claim 3, wherein The output ends of the boost converter (212) and the buck-boost converter (24) are also connected with an inverter (25), and the output end of the inverter (25) is connected to the monitoring module (4).

8. The multi-power water quality monitor according to claim 7, characterized in that, The monitoring module (4) includes a pH sensor (41), a temperature sensor (42), a turbidity sensor (43), a dissolved oxygen sensor (44), and a conductivity sensor (45) connected to the processor (1).

9. The multi-power water quality monitor according to claim 3, characterized in that, The wireless transceiver module (3) includes an antenna (31), a radio frequency front end (32) bidirectionally connected to the antenna (31), an intermediate frequency amplifier (33) connected to the radio frequency front end (32), a modulator-demodulator (34) connected to the intermediate frequency amplifier (33) and the radio frequency front end (32), and the modulator-demodulator (34) is also connected to the processor (1).

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