CN219776836U - Multifunctional electronic water gauge - Google Patents
Multifunctional electronic water gauge Download PDFInfo
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- CN219776836U CN219776836U CN202320985306.1U CN202320985306U CN219776836U CN 219776836 U CN219776836 U CN 219776836U CN 202320985306 U CN202320985306 U CN 202320985306U CN 219776836 U CN219776836 U CN 219776836U
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Abstract
The utility model relates to the technical field of water level monitoring tools, in particular to a multifunctional electronic water gauge which comprises a power supply, a collector and an electronic water gauge, wherein a main PCBA circuit board electrically connected with the power supply is arranged in the collector, an RS485 output functional module, a 0-10V voltage output functional module, a 4-20mA current output module, a direct current relay output functional module, a wireless radio frequency output functional module, a CAN communication output and networking communication output functional module, a PWM voltage control output module, a PWM current control output module, an LCD (liquid crystal display) screen, an LCD screen display abnormality alarm module, an LED indicator lamp, an address dial switch, a baud rate dial switch, a mini USB socket and a main micro-processing chip are arranged on the main PCBA circuit board; the electronic water gauge is internally provided with a slave PCBA circuit board which is electrically connected with a power supply, and the slave PCBA circuit board is provided with a water depth measuring probe, a water temperature measuring probe, a multichannel change-over switch and a slave micro-processing chip; the slave microprocessor chip is in signal connection with the master microprocessor chip.
Description
Technical Field
The utility model relates to the technical field of water level monitoring tools, in particular to a multifunctional electronic water gauge.
Background
The electronic water gauge is an instrument for monitoring the water level, and data is acquired by measuring the water level of the electrode. The water level monitoring device is used for monitoring the water level in water conservancy projects such as rivers, lakes, reservoirs, hydropower stations, irrigation areas, water delivery and the like, and is also suitable for monitoring the water level in municipal projects such as tap water, municipal sewage treatment, urban road ponding and the like. The working principle of the electronic water gauge is to measure the water level of the electrode by utilizing the weak conductivity principle of water to acquire data. The electronic water gauge is generally installed by adopting an adhesive wall. The operation modes of the electronic water gauge generally comprise a null-height mode, a water depth mode and a tilting mode.
The electronic water gauge existing in the market has the following defects: the function is single, can only be used for monitoring the water level, can not measure the water temperature, and has no selectable multiple output function modes; under the condition of wind on the water surface, the wave (fluctuation amplitude) of the water is particularly large, the error of measuring the water level is large, and accurate measurement is difficult to achieve.
Thus, there is room for improvement in the art.
Disclosure of Invention
Aiming at the problems, the utility model provides a multifunctional electronic water gauge which has the multifunctional advantages of water level measuring function, water temperature measuring function, optional multiple output function modes, wave fluctuation preventing measuring function for water level and the like, and can realize accurate measurement.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the multifunctional electronic water gauge comprises a power supply, a collector and an electronic water gauge, wherein the collector is fixedly connected with the electronic water gauge; the collector is internally provided with a main PCBA circuit board electrically connected with a power supply, wherein the main PCBA circuit board is provided with an RS485 output function module, a 0-10V voltage output function module, a 4-20mA current output module, a direct current relay output function module, a wireless radio frequency output function module, a CAN communication output and networking communication output function module, a PWM voltage control output module, a PWM current control output module, an LCD liquid crystal display, an LCD display abnormality alarm module, an LED indicator lamp, an address dial switch, a baud rate dial switch, a mini USB socket and a main micro-processing chip; the electronic water gauge is internally provided with a slave PCBA circuit board which is electrically connected with a power supply, and the slave PCBA circuit board is provided with a water depth measuring probe for measuring water level, a water temperature measuring probe for measuring water temperature, a multichannel change-over switch and a slave micro-processing chip; the slave microprocessor chip is in signal connection with the master microprocessor chip; the side walls of the two sides of the shell of the electronic water gauge are provided with a plurality of groups of perforations which are used for preventing the water level from wave fluctuation at intervals.
According to the scheme, the electronic water gauge comprises a U-shaped shell, a partition plate, stainless steel printing rules and end covers, wherein the partition plate is fixed in the U-shaped shell, a first cavity for accommodating a slave PCBA circuit board is formed between the partition plate and a bottom plate of the U-shaped shell, the slave PCBA circuit board is arranged on the partition plate, slots are formed in the end parts of the side walls of the two sides of the U-shaped shell, the stainless steel printing rules are arranged in the slots, and a second cavity is formed between the stainless steel printing rules and the partition plate; the plurality of perforations are positioned on the side walls of the two sides of the U-shaped shell of the second cavity, and the water depth measuring probe and the water temperature measuring probe pass through the hole sites on the partition plate and then are positioned in the second cavity; the first end of the electronic water gauge is fixedly connected with a collector mounting plate of the collector through screws, the second end of the electronic water gauge is fixedly connected with the end cover through screws, and a plurality of through holes which can be communicated with the first cavity and the second cavity are respectively formed in the collector mounting plate and the end cover.
According to the scheme, the first cavity and the second cavity are separated into two non-communicated cavities through the partition plate.
According to the scheme, the water depth measuring probe comprises a plurality of electrode water level measuring probes and an electrode datum point probe which are arranged in a vertical direction, and the stainless steel printing ruler is provided with scale readings matched with the plurality of electrode water level measuring probes.
According to the scheme, the length of the slave PCBA circuit board is matched with the length of the U-shaped shell.
According to the scheme, the main PCBA circuit board and the auxiliary PCBA circuit board are electrically connected to the power supply in a parallel mode, the main PCBA circuit board and the auxiliary PCBA circuit board are coated by waterproof glue, a TVS protection tube for preventing static electricity and lightning stroke and an ultra-low capacitance double-rail opposite-rail ESD protection diode are connected in the auxiliary PCBA circuit board, and a ground wire capable of being connected with the ground is connected in the electronic water gauge.
According to the scheme, the power supply comprises a main power supply, an isolation power supply, an LCD screen power supply, a backlight power supply, a direct-current relay power supply, an acquisition-main microprocessor chip power supply, a water level detection-auxiliary microprocessor chip power supply, a multichannel change-over switch chip power supply and an operational amplifier chip power supply.
According to the scheme, be equipped with fixed mounting subassembly on the electron water gauge, fixed mounting subassembly includes left L type mounting piece, right L type mounting piece, bolt and nut.
The utility model has the beneficial effects that:
1) The electronic water gauge in the prior art can only output singly, but the utility model can output multiple selectable output functional modes and can be flexibly configured according to the actual needs of users;
2) The electronic water gauge in the prior art can only be used for water level test, but the electronic water gauge not only can be used for water level test, but also can be used for water temperature test, and has various functions;
3) The shell of the electronic water gauge in the prior art is not perforated, water can only flow into the shell from the bottom end of the water gauge, the water flow at the bottom end is large, the fluctuation of the water is large, and the measurement error is large.
Drawings
FIG. 1 is an exploded view of the assembly of the collector of the present utility model with an electronic water gauge;
FIG. 2 is an enlarged view of the position A in FIG. 1;
FIG. 3 is an enlarged view of the position B in FIG. 1;
FIG. 4 is an enlarged view of the position C in FIG. 1;
FIG. 5 is a circuit diagram of the power supply, collector and electronic water gauge assembly of the present utility model;
FIG. 6 is a functional schematic block diagram of a power supply of the present utility model;
FIG. 7 is a functional schematic block diagram of a collector of the present utility model;
FIG. 8 is a functional schematic block diagram of an electronic water gauge of the present utility model.
In the figure: 10. a collector; 11. a collector mounting plate; 20. an electronic water gauge; 21. a partition plate; 22. stainless steel printing rule; 23. a water depth measurement probe; 231. an electrode datum point probe; 24. a water temperature measurement probe; 25. an end cap; 26. perforating; 27. a bottom plate; 28. a slot; 29. a U-shaped housing; 30. left L-shaped mounting piece; 31. right L-shaped mounting piece; 32. a bolt; 33. and (3) a nut.
Detailed Description
The technical scheme of the utility model is described below with reference to the accompanying drawings and examples.
As shown in fig. 1 to 8, the multifunctional electronic water gauge of the present utility model comprises a power supply, a collector 10 and an electronic water gauge 20, wherein the collector 10 is fixedly connected with the electronic water gauge 20; the collector 10 is internally provided with a main PCBA circuit board electrically connected with a power supply, wherein the main PCBA circuit board is provided with an RS485 output functional module, a 0-10V voltage output functional module, a 4-20mA current output module, a direct current relay output functional module, a wireless radio frequency output functional module, a CAN communication output and networking communication output functional module, a PWM voltage control output module, a PWM current control output module, an LCD liquid crystal display screen, an LCD screen display abnormality alarm module, an LED indicator lamp, an address dial switch, a baud rate dial switch, a mini USB socket and a main micro-processing chip; the electronic water gauge in the prior art can only output singly, but the utility model can output multiple selectable output functional modes and can be flexibly configured according to the actual needs of users.
Wherein, the electronic water gauge 20 is internally provided with a slave PCBA circuit board electrically connected with a power supply, and the slave PCBA circuit board is provided with a water depth measuring probe 23 for measuring water level, a water temperature measuring probe 24 for measuring water temperature, a multi-channel change-over switch and a slave micro-processing chip; the electronic water gauge in the prior art can only be used for water level test, but the electronic water gauge not only can be used for water level test, but also can be used for water temperature test, and has various functions. It should be noted that the utility model preferably adopts a layered temperature measurement function to realize the measurement of the water environmental temperature and the layered temperature in water; the measured value of the water level and the data output can be dynamically corrected in time and accurately according to the water temperature change value of the water level, so that the measurement accuracy and the stability are improved.
The slave micro-processing chip is in signal connection with the master micro-processing chip; so that real-time test data of the electronic water gauge 20 can be acquired by the collector 10 in real-time information.
Wherein, a plurality of groups of perforations 26 for preventing wave change of the water level are arranged on the side walls of the two sides of the shell of the electronic water gauge 20 at intervals. In the utility model, a plurality of perforations 26 are designed on the side walls of the two sides of the shell of the electronic water gauge 20, so that the tested water at different positions can uniformly enter the electronic water gauge 20 from the outside of the electronic water gauge 20 through the perforations 26, the impact of water impact force and wave vibration can be reduced, and the measurement error can be reduced.
In practical application, tens to hundreds of small perforations 26 are distributed at equal intervals (1 cm intervals) (the larger the measuring range of the electronic water gauge 20 is, the larger the number of small perforations 26 is).
In this embodiment, the electronic water gauge 20 includes a U-shaped housing 29, a partition board 21, a stainless steel print ruler 22 and an end cover 25, the partition board 21 is fixed in the U-shaped housing 29, a first cavity for accommodating a slave PCBA circuit board is formed between the partition board 21 and a bottom plate 27 of the U-shaped housing 29, the slave PCBA circuit board is mounted on the partition board 21, slots 28 are provided on the end portions of two side walls of the U-shaped housing 29, the stainless steel print ruler 22 is mounted in the slots 28, and a second cavity is formed between the stainless steel print ruler 22 and the partition board 21; the plurality of perforations 26 are positioned on the side walls of the two sides of the U-shaped shell 29 of the second cavity, and the water depth measuring probe 23 and the water temperature measuring probe 24 pass through the holes on the partition plate 21 and then are positioned in the second cavity; in practical application, the front surface of the PCBA circuit board is located in the first cavity, and the water depth measuring probe 23 and the water temperature measuring probe 24 are arranged on the back surface of the PCBA circuit board and located in the second cavity.
The first end of the electronic water gauge 20 is fixedly connected with the collector mounting plate 11 of the collector 10 through screws, the second end of the electronic water gauge 20 is fixedly connected with the end cover 25 through screws, and a plurality of through holes which can be communicated with the first cavity and the second cavity are respectively formed in the collector mounting plate 11 and the end cover 25. Through set up a plurality of through-holes respectively on collector mounting panel 11 and end cover 25 for the mode that water flowed into inside the casing from the casing outside has: 1) Water flows into the first cavity and the second cavity from the top of the electronic water gauge 20 through a plurality of through holes on the collector mounting plate 11; 2) Water flows from the bottom of the electronic water gauge 20 into the first and second cavities through the plurality of through holes in the end cover 25; 3) Water flows from the side of the electronic water gauge 20 into the second cavity through the plurality of perforations 26.
In practical application, it is preferable that the collector mounting plate 11 and the end cover 25 are respectively provided with 6 through holes, and the 6 through holes are separated into two groups by the partition plate 21 and are respectively communicated with the first cavity and the second cavity.
In this embodiment, the first cavity and the second cavity are separated into two non-communicating cavities by a partition 21.
In this embodiment, the water depth measuring probe 23 includes a plurality of electrode water level measuring probes arranged in a vertical direction and an electrode datum point probe 231, and the stainless steel printing ruler 22 is provided with scale readings matched with the plurality of electrode water level measuring probes. In practical applications, it is preferable that the electronic water gauge 20 measures a water level ranging from 0 to 0.5m high, and thus there are 50 water level measuring probes at the electrode.
In this embodiment, the length of the slave PCBA circuit board matches the length of the U-shaped housing 29.
In this embodiment, the main PCBA circuit board and the slave PCBA circuit board are electrically connected to the power supply in parallel, the main PCBA circuit board and the slave PCBA circuit board are all coated by waterproof glue, the slave PCBA circuit board is connected with a TVS protection tube for preventing static electricity and lightning strike and an ultra-low capacitance double-rail-to-rail ESD protection diode, and the electronic water gauge 20 is connected with a ground wire which can be connected to the ground. It has a good protective effect, effectively improving the service life of the electronic water gauge 20.
In this embodiment, the power supplies include a main power supply, an isolation power supply, an LCD screen power supply and a backlight power supply, a dc relay power supply, an acquisition-main microprocessor, a water level detection-slave microprocessor chip and a multi-channel transfer switch chip power supply, and an operational amplifier chip power supply.
In this embodiment, the electronic water gauge 20 is provided with a fixed mounting assembly, and the fixed mounting assembly includes a left L-shaped mounting plate 30, a right L-shaped mounting plate 31, a bolt 32, and a nut 33. The structure is simple, and the assembly and the disassembly are convenient.
As shown in fig. 5, the connection relationship between the power supply, the collector 10 and the electronic water gauge 20 according to the present utility model is schematically shown. In the figure: DC is direct current; DC-DC is direct current to direct current (the direct current of one voltage value is changed into the current of another voltage value); LDO is linear voltage stabilization; the MCU is a microprocessor; IO is input and output; UART is a universal asynchronous receiver/transmitter; the LCD is a liquid crystal display screen; RS485 is half duplex serial communication; the LED is a light-emitting diode indicator lamp; USB is a universal serial bus.
As shown in fig. 5 and 6, the power supply according to the present utility model is divided into seven parts, respectively: a main power supply; isolating the power supply; an LCD screen power supply and a backlight power supply; a DC relay power supply; acquisition-main microprocessor chip power supply; an operational amplifier chip power supply; water level detection-slave microprocessor chip and multi-channel transfer switch chip power supply. In the figure:
1) The main power supply path is: alternating current 220V or alternating current 380V- & gt AC/DC power adapter, obtain main power direct current 24V- & gt linear voltage stabilization- & gt DC12.7V- & gt linear voltage stabilization- & gt DC3.3V (supplying power to main microprocessor chip) and LCD screen power supply;
2) DC12.7V branch one: obtaining an isolated power supply DC12.7V, isolating and stabilizing voltage, and supplying power to the digital chip by DC3.3V;
3) DC12.7V branch two: obtaining a direct-current relay power supply, namely DC12.7V, reducing voltage through a diode, and obtaining DC12V of the direct-current relay power supply;
4) DC12.7V branch three: supplying power to an operational amplifier of the electronic water gauge system;
5) DC12.7V branch four: DC12.7V, linear voltage stabilization, DC5V, and power supply to the water level detection-slave microprocessor chip and the multichannel change-over switch chip.
Wherein, keep apart the power: the direct current 12.7V power supply is converted into the isolated direct current 5V power supply by using a 12.7V-to-5V isolated power supply chip, and then the isolated direct current 3.3V power supply is obtained by using a linear step-down power supply chip, so that the isolated RS485 chip is supplied with power.
The operational amplifier is arranged on a main PCBA circuit board of the collector 10 and is connected with the main microprocessor chip, and the operational amplifier is used for amplifying PWM voltage output and PWM current output signals of the main microprocessor chip respectively and converting the PWM voltage output and the PWM current output signals into voltage output type output voltages (0-10V/0-5V) and current output type output currents (4-20 mA) which meet the output requirements respectively; the input of the operational amplifier is a PWM input/output port signal of the main microprocessor chip; the output of the operational amplifier is a load.
As shown in fig. 5 and 7, the collector 10 according to the present utility model is divided into ten parts, respectively: a main microprocessor chip; primary RS485 communication; displaying on an LCD screen; a voltage control output of PWM (pulse width control); a current control output of PWM (pulse width control); selecting different baud rate settings by a dial switch and selecting a MODBUS (a serial communication protocol) address setting by a dial switch; driving a direct current relay; a plurality of selectable output function modes; wireless output (which is flexibly configured according to the actual needs of the customer); LED lamp indication and LCD screen display abnormality alarm.
Wherein, PWM is a control type output mode; PWM Chinese means voltage pulse width control, which is contained in the I/O port of the main singlechip, namely the input/output port, to 0-10V output.
The baud rate code pulling switch and the address selecting switch are arranged on the collector 10, the baud rate code pulling switch is a 3-gear electronic code pulling switch, is a patch electronic element, and one end of the patch electronic element is grounded and the other end of the patch electronic element is connected with a control signal; the communication baud rate selection method is used for selecting the communication baud rate of the main singlechip; the address selection switch is an electronic code pulling switch with 8 gears, is a patch electronic element, and one end of the address selection switch is grounded and the other end of the address selection switch is connected with a control signal; the method is used for selecting the communication address of the main singlechip.
The dc relay is on the collector 10, and functions as follows: when the direct current relay is required to output, the direct current relay is controlled by the main singlechip; closing the output contact end of the original opened direct current 12.7V relay (to the normally open relay); and outputting the data stored by the singlechip to a load. It is actually an electronic switch controlled by the single-chip microcomputer.
One of four outputs common to the collector 10 is used. Namely: outputting a direct current relay; RS485 output; voltage output of 0-10V/0-5V; 4-20mA current output. The user may select one output mode (two or more output modes cannot be simultaneously selected).
The LCD screen is a 128-column X64-row lattice monochromatic display screen, 1/64DUTY,1/9BIAS; FSTN positive polarity, voltage 3.3V; a 4-wire SPI serial interface may be used; the size was 43.5X33.8X3.5mm; controlling a backlight of an LCD screen; the display contents of the LCD screen are as follows: water level value, various register states (water immersion state, direct current relay state, layered water temperature, electronic water gauge splicing number, abnormal number and position of electrode probes, etc.), reference value, upper and lower temperature limit values, abnormal alarm prompt, USB socket state, etc.; in practical application, for the LCD screen with the updated version, the LCD screen with larger size and more complete functions can be flexibly selected according to the practical needs of users.
The mini-USB socket can perform input and output access operations on the collected temperature data and water level data.
The working principle of the collector 10 of the utility model is as follows:
1) When display is needed, the acquisition-main microprocessor chip controls the LCD screen backlight; the LCD screen is lightened for display; when the display is not needed, the backlight of the LCD screen is turned off.
2) When the output is needed, one of the four corresponding general outputs is selected by setting the built-in jumper switch, and the data output of the water level value is controlled by the acquisition-main microprocessor chip.
3) When data transmission is needed, the main microprocessor chip performs data transmission through the RS485 chip with isolation.
4) When the data transmission of the USB socket is needed, the acquisition-main microprocessor chip is in the working state of the USB.
5) When networking is needed, the acquisition-main processor chip is in a networking working state (is an upgrade).
6) When CAN communication is needed, the acquisition-main processor chip is in a CAN communication working state (being an upgrade version).
7) When abnormal data exists, the acquisition-main processor chip is in an alarm working state.
8) When no display or no output or no data transmission or no USB socket or no networking or no CAN communication or no abnormal data transmission is needed, the acquisition-main microprocessor chip is in a dormant state.
Wherein there are various ambient temperature parameter settings and other parameter settings in the software control program of the acquisition-master microprocessor.
As shown in fig. 5 and 8, the electronic water gauge 20 according to the present utility model is divided into six parts, respectively: the metal electrodes (with waterproof glue coverage) with a datum point are arranged on a PCB, wherein the metal electrodes (1 to 50) are vertically arranged at equal intervals with the interval of 1 cm; the 50 metal electrodes and the datum point electrodes are arranged on the reverse side of one PCB (one side without a patch electronic element), so that the measuring range of the water level is 50cm, if the measuring range of the water level is 150cm, 3 identical electronic PCBs are used, the two electronic PCBs are cascaded in series through , if the measuring range of the water level is 250cm, 5 identical electronic PCBs are used, the two electronic PCBs are cascaded in series through , and the like; a multi-channel change-over switch chip for realizing water immersion positioning detection; a slave microprocessor chip; communication from RS 485; detecting the layering temperature of the water level; various protections.
Wherein, main microprocessor refers to the singlechip in the collector 10, and main microprocessor work module has: communicating with a slave microprocessor chip; RS485 communication data transmission; an LCD screen display interface; baud rate setting and MODBUS address setting interfaces; the voltage and current of PWM control output interface; driving a direct current relay; a plurality of selectable output function modes; an LED lamp indication; USB (universal serial bus) communication.
Wherein, the slave microprocessor refers to a singlechip in the electronic water gauge 20, and the slave microprocessor working module comprises: communicate with the main microprocessor chip; RS485 communication data transmission; using a layered temperature measurement function; selecting electrodes of each channel; monitoring and collecting water level data of each electrode; TVS (transient suppression diode) protection tube for static electricity and lightning strike and ultra low capacitance double rail to rail ESD (electrostatic discharge) protection diode.
The master RS485 communication is that the input of the master RS485 communication is from a UART communication port of the master singlechip, and the output of the master RS485 communication is connected to a main body electronic PCBA circuit board of the electronic water gauge through an RS485 chip; the master RS485 is from a UART communication port signal of the master singlechip to a UART communication port signal of the slave singlechip, the input of the slave RS485 is from the UART communication port of the master singlechip, the slave RS485 firstly passes through a digital isolation chip (a data stream end) and an optical coupling isolation chip (a control end), and then passes through the RS485 chip, and the output of the slave RS485 chip is connected to a main body electronic PCBA circuit board of the electronic water gauge; the secondary RS485 is from the UART communication port signal of the main singlechip to the UART communication port signal of the secondary singlechip, and simultaneously from the UART communication port signal of the singlechip to the UART communication port signal of the main singlechip, the signal flow direction is respectively controlled by the main singlechip and the secondary singlechip.
The multi-channel change-over switch is arranged on the electronic water gauge 20, and the electronic water gauge 20 with the measuring range of 0-0.5 meter is provided with 50 electrode water level measuring probes 23 and one electrode datum point probe 231. The electronic chip is provided with 8 multichannel change-over switch electronic chips, 50 electrode water level measuring probes are divided into 8 groups, and the principle and the function are that: the 1 st to 50 th electrode probe signals are respectively selected by the S0, S1 and S2 address code control signals of the slave singlechip and input into an information collecting system of the slave singlechip, and are subjected to internal data filtering and other processes. Outputting again; for an electronic water gauge with a measuring range of 0-1 meter, there are 100 electrode water level measuring probes and two electrode datum point probes, and the electronic water gauge is provided with 16 multi-channel change-over switch electronic chips, and the 100 electrode water level measuring probes are divided into 16 groups.
The anti-static and lightning stroke are connected to the direct current +12.7V power input end of the collector 10 through a bidirectional TVS tube, and are connected to the main RS485 and the auxiliary RS485 communication output end of the collector 10 through the bidirectional TVS tube and the unidirectional TVS tube; through the bidirectional TVS tube, the power input end of the electronic water gauge 20 from the PCBA circuit board is connected; and the two-way TVS pipe and the one-way TVS pipe are connected to the RS485 communication output end of the slave PCBA circuit board connected to the electronic water gauge 20. The aluminum metal structural shell of the main body of the electronic water gauge 20 is connected with an external large ground wire through a ground wire, so that when lightning strike occurs, the product can be prevented from being damaged due to high-voltage lightning impulse.
Wherein, the master singlechip and the slave singlechip both have reset functions. When the system is powered off and needs to be recovered again, the master singlechip and the slave singlechip are reset automatically; when a fault occurs, the master singlechip and the slave singlechip can both store the fault state and corresponding data at the time, so that maintenance personnel can check and analyze the fault. The reset function is: and maintaining the initialized state and data of the singlechip.
The working principle of the electronic water gauge 20 is as follows:
1) When the data transmission in the machine is needed, the slave microprocessor chip performs the data transmission through the RS485 chip with the isolation.
2) When the temperature monitoring is needed, the slave microprocessor chip is in a working state of temperature detection. And measuring the temperature in a layering way, and calculating and storing a temperature compensation correction value.
3) When the water level monitoring is needed, the slave microprocessor chip is in the working state of water level monitoring. The water level value of each electrode and the reference point electrode value.
4) When networking is needed, the water level detection-slave processor chip is in a networking working state (is an upgrade).
5) When CAN communication is needed, the water level detection-slave processor chip is in a CAN communication working state (is an upgrade version).
6) When abnormal data exists, the water level detection-slave processor chip is in an alarm working state.
7) The water level detection-slave microprocessor chip is in a dormant state when no temperature monitoring or no water level monitoring or no data transmission or no networking or no CAN communication or no abnormal data transmission is required.
Wherein, layering temperature measurement principle: when the electronic water gauge 20 is used for measuring the water temperature, the measuring range is layered, namely, each 50cm layer is defined as one layer, and each layer is provided with a thermosensitive element for measuring the temperature. If the measuring range of the electronic water gauge is less than or equal to 50cm, layering is not needed, and only 1 layer of electronic PCBA circuit boards are arranged; if the measuring range of the electronic water gauge is less than or equal to 150cm, the measuring range is more than 100cm; the electronic PCBA circuit board is divided into three layers, wherein 3 electronic PCBA circuit boards with the measurable range of 50cm are required to be connected in a two-to-two serial cascade mode, and the like; the larger the measuring range of the electronic water gauge is, the larger the layering number is; the actual layering number of the product is flexibly configured according to the actual requirement of a user; if the temperature measurement accuracy of the product is improved, a thermocouple or a thermoelectric bridge is used for measuring the temperature value; the temperature measurement of the multiple layers is linear superposition based on the temperature measurement of the single layer, and the self-correction PI of the temperature data is a PI algorithm; this is the most widely used algorithm that can eliminate residual errors using integral control.
The embodiments of the present utility model have been described above with reference to the accompanying drawings, but the present utility model is not limited to the above-described embodiments, which are merely illustrative, not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are all within the scope of the present utility model.
Claims (8)
1. The utility model provides a multi-functional electron water gauge which characterized in that: the intelligent water meter comprises a power supply, a collector (10) and an electronic water gauge (20), wherein the collector (10) is fixedly connected with the electronic water gauge (20);
a main PCBA circuit board electrically connected with a power supply is arranged in the collector (10), and an RS485 output functional module, a 0-10V voltage output functional module, a 4-20mA current output module, a direct current relay output functional module, a wireless radio frequency output functional module, a CAN communication output and networking communication output functional module, a PWM voltage control output module, a PWM current control output module, an LCD display screen, an LCD screen display abnormality alarm module, an LED indicator lamp, an address dial switch, a baud rate dial switch, a mini USB socket and a main micro-processing chip are arranged on the main PCBA circuit board;
a slave PCBA circuit board electrically connected with a power supply is arranged in the electronic water gauge (20), and a water depth measuring probe (23) for measuring the water level, a water temperature measuring probe (24) for measuring the water temperature, a multichannel change-over switch and a slave micro-processing chip are arranged on the slave PCBA circuit board;
the slave micro-processing chip is in signal connection with the master micro-processing chip;
a plurality of groups of perforations (26) for preventing wave fluctuation of the water level are arranged on the side walls of the two sides of the shell of the electronic water gauge (20) at intervals.
2. A multifunctional electronic water gauge according to claim 1, wherein: the electronic water gauge (20) comprises a U-shaped shell (29), a partition board (21), stainless steel printing rules (22) and an end cover (25), wherein the partition board (21) is fixed in the U-shaped shell (29), a first cavity for accommodating a slave PCBA circuit board is formed between the partition board (21) and a bottom plate (27) of the U-shaped shell (29), the slave PCBA circuit board is arranged on the partition board (21), slots (28) are formed in the end parts of the side walls of two sides of the U-shaped shell (29), the stainless steel printing rules (22) are arranged in the slots (28), and a second cavity is formed between the stainless steel printing rules (22) and the partition board (21);
the plurality of perforations (26) are positioned on the side walls of the two sides of the U-shaped shell (29) of the second cavity, and the water depth measuring probe (23) and the water temperature measuring probe (24) pass through the hole sites on the partition plate (21) and then are positioned in the second cavity;
the first end of the electronic water gauge (20) is fixedly connected with a collector mounting plate (11) of the collector (10) through screws, the second end of the electronic water gauge (20) is fixedly connected with an end cover (25) through screws, and a plurality of through holes which can be communicated with the first cavity and the second cavity are respectively formed in the collector mounting plate (11) and the end cover (25).
3. A multifunctional electronic water gauge according to claim 2, wherein: the first cavity and the second cavity are separated into two non-communicated cavities through a partition plate (21).
4. A multifunctional electronic water gauge according to claim 2, wherein: the water depth measuring probe (23) comprises a plurality of electrode water level measuring probes and an electrode datum point probe (231), wherein the electrode water level measuring probes and the electrode datum point probe are arranged in the vertical direction, and scale readings matched with the electrode water level measuring probes are arranged on the stainless steel printing ruler (22).
5. A multifunctional electronic water gauge according to claim 2, wherein: the length of the slave PCBA circuit board is matched with the length of the U-shaped shell (29).
6. A multifunctional electronic water gauge according to claim 1, wherein: the main PCBA circuit board and the slave PCBA circuit board are electrically connected to a power supply in a parallel mode, the main PCBA circuit board and the slave PCBA circuit board are coated by waterproof glue, a TVS protection tube for preventing static electricity and lightning stroke and an ultra-low capacitance double-rail-to-rail ESD protection diode are connected in the slave PCBA circuit board, and a ground wire which can be connected with the ground is connected in the electronic water gauge (20).
7. A multifunctional electronic water gauge according to claim 1, wherein: the power supply comprises a main power supply, an isolation power supply, an LCD screen power supply, a backlight power supply, a direct-current relay power supply, an acquisition-main microprocessor chip power supply, a water level detection-auxiliary microprocessor chip power supply, a multichannel change-over switch chip power supply and an operational amplifier chip power supply.
8. A multifunctional electronic water gauge according to claim 1, wherein: the electronic water gauge (20) is provided with a fixed installation assembly, and the fixed installation assembly comprises a left L-shaped installation piece (30), a right L-shaped installation piece (31), a bolt (32) and a nut (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320985306.1U CN219776836U (en) | 2023-04-27 | 2023-04-27 | Multifunctional electronic water gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320985306.1U CN219776836U (en) | 2023-04-27 | 2023-04-27 | Multifunctional electronic water gauge |
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| Publication Number | Publication Date |
|---|---|
| CN219776836U true CN219776836U (en) | 2023-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320985306.1U Active CN219776836U (en) | 2023-04-27 | 2023-04-27 | Multifunctional electronic water gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219776836U (en) |
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2023
- 2023-04-27 CN CN202320985306.1U patent/CN219776836U/en active Active
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