CN219368819U - A kind of intelligent water meter based on single chip computer - Google Patents

Abstract

The utility model discloses an intelligent water meter based on a single-chip microcomputer, which belongs to the technical field of intelligent water meter monitoring and is used for improving the accuracy of water quantity monitoring of the intelligent water meter, and in particular relates to an intelligent water meter based on a single-chip microcomputer. Two impellers, and magnetic steels are respectively set on the tops of the two impeller shafts, and magnetic switch sensors are respectively set above the magnetic steels, the water flow passes through the casing and drives the impellers to rotate, and at the same time, the two impellers rotate in the casing respectively to form a circle. Tangent, and then drive the magnetic steel to rotate, the magnetic switch sensor located above the magnetic steel is transmitted to the PIC microcontroller for processing according to the change of the magnetic field and the switching signal generated alternately. When the magnetic steel reverses, the pulse signal generated by the two magnetic switch sensors The order will be reversed, and the PIC microcontroller can collect these switching signals to realize forward and reverse flow counting and improve the monitoring effect of the smart water meter.

Description

A kind of intelligent water meter based on single chip computer

technical field

The utility model belongs to the technical field of intelligent water meters and is used for improving the water quantity monitoring accuracy of the intelligent water meters, in particular to an intelligent water meter based on a single-chip microcomputer.

Background technique

A smart water meter is a new type of water meter that uses modern microelectronics technology, modern sensing technology, and smart IC card technology to measure water consumption, transmit water data, and settle transactions. Compared with traditional water meters, it only has the functions of flow collection and mechanical pointer display. Compared with the volume function, it is a great improvement. In addition to recording and electronically displaying the water consumption, the smart water meter can also control the water consumption according to the agreement, and automatically complete the calculation of the water fee of the stepped water price, and can also store the water consumption data. Existing smart water meters use microprocessors, valves, flow sensors, IC card readers/writers, displays, power supplies and software integrated on microprocessors to realize the ideal management mode of "pay first and then use water" and card settlement , providing a convenient statistical query function, which is convenient for a comprehensive and timely understanding of the situation and provides a basis for decision-making. However, the existing smart water meters have the problems of high power consumption and inaccurate measurement in the process of actual use, the problem of high cost in the manufacturing process, and the problems of poor high temperature resistance and vibration resistance in special occasions. ; Especially the flow sensor used cannot effectively monitor the flow of water flowing backward through the water meter. In order to reduce the cost and improve the measurement accuracy of the water meter, the utility model provides an intelligent water meter based on a single-chip microcomputer.

Utility model content

The purpose of the utility model is to provide an intelligent water meter based on a single-chip microcomputer to solve the problem of poor monitoring effect existing in the prior art.

In order to solve the above technical problems, the technical solution adopted by the utility model is: an intelligent water meter based on a single-chip microcomputer, including a housing, the two ends of the housing are respectively provided with a water inlet pipe and a water outlet pipe, and the water inlet pipe is provided with a smart meter. A control mechanism, the housing is provided with a water volume monitoring mechanism, the water volume monitoring mechanism includes two oppositely arranged impellers, magnetic steels respectively arranged at the top ends of the rotating shafts of the two impellers, and a magnetic steel respectively arranged above the two magnetic steels. A magnetic switch sensor, the magnetic switch sensor is electrically connected to the intelligent control mechanism.

The housing includes a water meter upper cover and a water meter lower cover, the impeller, the water inlet pipe and the water outlet pipe are respectively arranged on the water meter lower cover, and the magnetic switch sensor is arranged on the water meter upper cover.

Water glass is arranged between the water meter upper cover and the water meter lower cover, and the magnetic switch sensor is located on the upper surface of the water glass.

A magnetic steel groove is arranged on the top of the rotating shaft, and the magnetic steel is installed in the magnetic steel groove.

The intelligent control mechanism includes a solenoid valve arranged on the water inlet pipe and a control unit arranged above the solenoid valve, and the control unit is electrically connected with the solenoid valve.

The control unit includes a PIC microcontroller, a power supply module, an IC module, a gate valve drive module and an LCD display module and are electrically connected to each other, and the gate valve drive module is connected to the electromagnetic valve.

The control unit also includes a NB-IoT module and a remote server, the NB-IoT module is electrically connected to the PIC microcontroller, and the remote server is connected to the NB-IoT module network.

Compared with the prior art, the utility model has the following advantages:

In the utility model, two impellers are relatively arranged in the casing, and magnetic steels are respectively arranged on the top ends of the rotating shafts of the two impellers, and magnetic switch sensors are respectively arranged above the magnetic steels. The water flow passes through the casing and drives the impellers to rotate, and at the same time The two impellers rotate separately in the housing to form a circle tangent, and then drive the magnet to rotate. The magnetic switch sensor located above the magnet transmits the switching signal to the PIC microcontroller for processing according to the change of the magnetic field and the alternate generation. When the magnet reverses, The sequence of the pulse signals generated by the two magnetic switch sensors will be reversed, and the PIC microcontroller can collect these switch signals to realize forward and reverse flow counting and improve the monitoring effect of the smart water meter.

Description of drawings

Fig. 1 is a schematic diagram of the smart water meter of the present invention.

Fig. 2 is the schematic diagram of connection between the water glass of the present invention and the lower cover of the water meter.

Fig. 3 is a schematic diagram of the connection between the lower cover of the water meter and the impeller of the present invention.

Fig. 4 is a schematic diagram of the electrical connection of the smart water meter of the present invention.

Fig. 5 is a schematic diagram of the working principle of the magnetic steel and the magnetic switch sensor in this embodiment.

In the figure: 1PIC microcontroller, 2IC module, 3 power module, 4 battery, 5 solenoid valve, 6 magnetic steel, 7 impeller, 8 water meter cavity, 9 water glass, 10 magnetic steel tank, 11 magnetic switch sensor, 12 antenna, 13 Main control board, 14NB-IoT module, 15LCD display module, 16 Water meter upper cover, 17 Water meter lower cover.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

As shown in Figure 1 and Figure 2, a smart water meter based on a single-chip microcomputer includes a housing, the two ends of the housing are respectively provided with a water inlet pipe and a water outlet pipe, the water inlet pipe is provided with an intelligent control mechanism, and the housing A water volume monitoring mechanism is provided in the body, and the water volume monitoring mechanism includes two oppositely arranged impellers 7, magnetic steels 6 respectively arranged at the tops of the rotating shafts of the two impellers 7, and magnetic switch sensors respectively arranged above the two magnetic steels 6 11. The magnetic switch sensor 11 is electrically connected to the intelligent control mechanism; the water flow passes through the casing and drives the impeller 7 to rotate, and at the same time, the two impellers 7 rotate in the casing to form a circle tangent, and then drive the magnetic steel 6 to rotate, The magnetic switch sensor 11 located above the magnetic steel 6 is transmitted to the PIC microcontroller 1 for processing according to the change of the magnetic field and the alternately generated switching signal. When the magnetic steel 6 is reversed, the order of the pulse signals generated by the two magnetic switch sensors 11 will be reversed. , PIC microcontroller 1 collects these switch signals, realizes forward and reverse flow counting, and improves the monitoring effect of the intelligent water meter.

As shown in Figure 2-Figure 5, in this embodiment, the PIC microcontroller 1 adopts the dsPIC30f4011 control chip of Microchip Company, the magnetic switch sensor 11 is a TMR sensor, the LCD display module adopts IPSLCD, and the IC module adopts MF522-AN non-contact type IC card read-write module, the chip is a low-voltage, low-cost, small-sized non-contact read-write card chip launched by NXP for the application of "three meters", which is widely used in smart meters; NB-IOT module adopts The NB module of EC-01 realizes remote meter reading based on the intelligent meter reading control management system. The solenoid valve is driven by a relay to start and stop, and the shell is made of metal parts. During specific installation, the housing includes a water meter upper cover 16 and a water meter lower cover 17, and the water meter upper cover 16 and the water meter lower cover 17 are fixed by sealing rings and bolts, wherein the two ends of the water meter lower cover 17 are respectively provided with water inlet pipes and water outlet pipes, An intelligent control mechanism is set on the water inlet pipe for automatic control and detection of water flow; two rotating shafts are arranged side by side in the water meter cavity 8 of the water meter lower cover 17, and the tops of the two rotating shafts are respectively provided with magnetic steel slots 10, and the magnetic steel slots 10 is connected with the mechanism, and the two magnetic steel grooves 10 are respectively and oppositely provided with magnetic steel 7, and the two impellers 7 rotate in the lower cover 17 of the water meter respectively to form a circle tangent, and the water flows through the impeller 7 to drive the rotating shaft and the magnetic steel 6 Rotate the water meter lower cover 17; the water meter lower cover 17 is provided with a water glass 9, the outer edge of the water glass 9 matches the water meter lower cover 17, and is connected by a sealing rubber ring; the water meter upper cover 16 is provided with two installation holes , magnetic switch sensors 11 are respectively arranged in the two mounting holes, wherein the magnetic switch sensors 11 and the magnetic steel 6 are vertically arranged, the magnetic switch sensors 11 are electrically connected with the intelligent control mechanism, and are used to collect the changes and alternate generation of the magnetic fields of the two magnetic steel 7 The switch signal is transmitted to the intelligent control mechanism for processing and display.

As shown in Figures 3-5, the intelligent control mechanism includes a solenoid valve 5 arranged on the water inlet pipe, a control unit arranged above the solenoid valve 5, the control unit is electrically connected to the solenoid valve 5, and the control unit controls the solenoid valve 5 to open or Close the water inlet pipe; the control unit includes PIC microcontroller 1 main control module, IC module 2, NB-IoT module 14, LCD display module 15, door valve drive module, magnetic switch sensor 11, power supply module 4 and are electrically connected to each other, wherein the PIC microcontroller 1 Main control module, IC module 2, NB-IoT module 14, LCD display module 15, gate valve drive module, power module, NB-IoT module 3, LCD display module 15 are integrated on the main control board 13, the battery 4 and the main control board The board 13 is electrically connected and installed on the smart water meter through the box body for remote control and detection of water volume; PIC microcontroller 1 model is dsPIC30F4011, which adopts an improved Harvard structure and a C compiler with flexible addressing modes to optimize the instruction set architecture , the PIC microcontroller is composed of a crystal oscillator circuit, a power supply filter circuit, and a reset circuit to realize the control function of the peripheral circuit, so that each module circuit can work normally and orderly; the magnetic switch sensor 11 adopts a TMR magnetic sensor, and uses double magnetic steel to send signals The pointer cooperates with two TMR1208 bipolar latch type magnetic switch sensor counting methods, with forward and reverse flow counting function, TMR1208 series magnetic switch chip is a bipolar latch type magnetic switch chip integrated with tunnel magnetic flux (TMR) sensor and CMOS circuit , to convert the changing magnetic field signal into a digital voltage signal to achieve accurate position detection; when the double magnet 7 rotates forward, the two TMR1208 bipolar latch type magnetic switch sensors will alternately generate switching signals according to the change of the magnetic field, forming For the pulse signals of 01, 00, 10, and 11, when the double magnetic steel 7 is reversed, the order of the pulse signals generated by the two TMR1208 bipolar latch type magnetic switch sensors will be reversed, and the PIC single chip and 1 are realized by collecting these pulse signals Forward and reverse flow counting; two of the TMR1208 bipolar latch type magnetic switch sensor signal output pins VOUT1 and VOUT2 are respectively connected to the RB4 and RB5 pins of the PIC microcontroller 1, and the RB4 and RB5 of the PIC microcontroller 1 are respectively The ADC acquisition channel AN4 and AN5 read the switch signal returned by the TMR1208 bipolar latch type magnetic switch sensor through AD sampling, so as to count, and further convert it into the flow of water, and then achieve the effect of measuring the flow of water; among them, the intelligent meter reading control The signal output point of the management system is connected to the NB-IOT module 14. The NB-IOT14 module uses the NB module of EC-01 to realize remote data transmission. IOTSoC supports ultra-low power consumption, and transmits water flow information, balance information, and fault information to the remote server through the NB-IOT module, and the remote server centrally manages the management, meter reading, and recharge of several smart water meters within the scope; the above The smart water meter in the water meter uses the more advanced MF522-AN non-contact IC card read-write module 1. This chip is a low-voltage, low-cost, small-sized non-contact read-write module launched by NXP for the application of "three meters". Write the card chip, the IC card design of the smart water meter is designed for the elderly who cannot operate remotely. The non-contact IC card should be used to realize the recharge and payment function; the solenoid valve 5 is driven by a relay. When the water balance is insufficient, the PIC single-chip opportunity control The relay closes the solenoid valve to achieve the effect of water cutoff. At the same time, the NB-IOT module transmits the insufficient balance information to the remote server, and the remote server will forward the information to the user. The user purchases water through online recharge or IC recharge. Operation; the display part adopts IPSLCD LCD display, in which ST7735S is used as the driver chip, and communicates with the PIC microcontroller through SPI. The SCL of the LCD is connected to the SCK1 pin of the microcontroller, and the SDA of the LCD is connected to the SDO1 pin of the microcontroller. The CS is connected to the SS1 pin of the single-chip microcomputer, and it is powered by a battery 4. In order to reduce power consumption, the terminal PIC single-chip microcomputer is usually in sleep mode, waiting for internal and external interrupt events to wake up. The data is collected through the TMR magnetic sensor module; after the set transmission data time is up, the PIC microcontroller 1 wakes up and activates the NB-IOT transmission module to start data transmission through the NB-IOT network and display it through the remote server; the intelligence provided by this product The water meter uses a simplified instruction set, with independent data lines and instruction lines, high code efficiency, anti-vibration, and high-temperature-resistant dsPIC30F4011 single-chip microcomputer module. The PIC single-chip microcomputer module is designed with low power consumption and has a flexible clock setting function. Wake up from a low-power consumption state, and can run in standby mode or stop mode respectively. The dsPIC30F4011 single-chip microcomputer has the characteristics of independent data lines and command lines and high code efficiency. The flow detection mechanism adopts the TMR sensor circuit, and the TMR sensor circuit is connected through the AN4 interface and the AN5 interface of the PIC microcontroller module; it is mainly realized through the TMR magnetic sensor module, and the double magnetic steel signaling pointer cooperates with two TMR1208 bipolar latch type The magnetic switch sensor counting method can achieve the purpose of accurate counting and positive and negative counting; the liquid crystal display module uses IPSLCD to connect to the SCK1, SDO1 and SS1 interfaces of the PIC microcontroller respectively to realize the display function of the used water volume and the remaining water volume, integrated LCD controller It can also meet the display requirements of smart water meters in different situations; the smart water meters transmit water flow information, balance information, and fault information to the remote server through the NB-IOT module, and the remote server centrally manages the management and copying of several smart water meters within the range The NB-IOT module adopts the NB module of EC-01, and the main chip solution used in the NB part is EC616S, and the EC-01 is connected with the PIC single-chip electromechanical. Contact IC card read-write module, the chip is a low-voltage, low-cost, small-sized non-contact read-write card chip launched by NXP for the application of "three meters", which is widely used in smart meters; smart water meters The IC card design is designed for the elderly and special groups who cannot operate remotely. It can use the non-contact IC card to realize the recharge and payment function. The non-contact IC card read-write module is electrically connected with the PIC microcontroller; in this embodiment, it is based on the PIC microcontroller The smart water meter adopts the dsPIC30F4011 main control chip with anti-vibration, high temperature resistance, fast operation speed and high code efficiency, and uses the TMR sensor of double magnetic steel to accurately collect the user's water consumption, and has the function of counting the reverse flow, and uploads it through NB-IOT The information of the water consumption and the remaining water volume is uploaded to the user terminal; the user can pay the water fee through remote recharging and IC card. At the same time, it is equipped with an IPSLCD liquid crystal display to display the water consumption and balance; the main control PIC microcontroller is usually in sleep mode, waiting for internal and external interrupt events to wake up, in order to meet the technical requirements of low power consumption, low cost, shock resistance and high temperature resistance .

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present utility model still belong to Within the scope of protection of the technical solution of the utility model.

Claims (7)

1. A kind of intelligent water meter based on single-chip microcomputer, it is characterized in that, comprise housing, the two ends of described housing are respectively provided with water inlet pipe and water outlet pipe, described water inlet pipe is provided with intelligent control mechanism, is provided with in described housing A water volume monitoring mechanism, the water volume monitoring mechanism includes two oppositely arranged impellers, magnetic steels respectively arranged at the tops of the rotating shafts of the two impellers, and magnetic switch sensors respectively arranged above the two magnetic steels, the magnetic switch sensors and The intelligent control mechanism is electrically connected. 2. A smart water meter based on a single-chip microcomputer according to claim 1, wherein the housing includes a water meter upper cover and a water meter lower cover, and the impeller, water inlet pipe and water outlet pipe are respectively arranged on the water meter lower cover Above, the magnetic switch sensor is arranged on the upper cover of the water meter. 3. A smart water meter based on a single-chip microcomputer according to claim 2, characterized in that: water glass is arranged between the water meter upper cover and the water meter lower cover, and the magnetic switch sensor is located on the upper surface of the water glass. 4. The intelligent water meter based on a single-chip microcomputer according to claim 1, characterized in that: a magnetic steel groove is arranged on the top of the rotating shaft, and the magnetic steel is installed in the magnetic steel groove. 5. A kind of intelligent water meter based on single-chip microcomputer according to claim 1, characterized in that: the intelligent control mechanism includes a solenoid valve arranged on the water inlet pipe, a control unit arranged above the solenoid valve, and the control unit It is electrically connected with the solenoid valve. 6. A kind of intelligent water meter based on single-chip microcomputer according to claim 5, characterized in that: said control unit includes PIC single-chip microcomputer, power supply module, IC module, door valve drive module and LCD display module and is electrically connected with each other, and said door valve drive A module is connected to the solenoid valve. 7. A kind of intelligent water meter based on single-chip microcomputer according to claim 6, characterized in that: the control unit also includes an NB-IoT module and a remote server, the NB-IoT module is electrically connected to a PIC single-chip microcomputer, and the remote The end server is connected to the NB-IoT module network.