CN206431806U - A kind of water meter reading system of the family based on Zigbee - Google Patents

Abstract

The utility model relates to the field of water meters, in particular to a meter reading system for household water meters based on Zigbee. The meter reading system provided by the utility model has both distributed and centralized features, can complete the data collection of each water meter unit at regular intervals, and has multiple centralized reading methods such as unicast, multicast, and broadcast. The meter reading system is composed of a remote server, Zigbee network, GPRS network and smart water meters, and generally forms a three-layer distributed structure of data acquisition layer, data transmission layer, and water meter monitoring management layer. The remote wireless meter reading system designed by combining Zigbee and GPRS brings benefits and convenience to users and enterprises. The main advantages include reducing the labor intensity and reducing the cost of meter reading; The problem of statistical difficulties caused by different meters can improve the level of management system and economic benefits; through the remote server, the situation of water meter nodes can be monitored in time and problems can be found and solved at any time.

Description

A meter reading system for household water meters based on Zigbee

technical field

The utility model relates to the field of water meters, in particular to a meter reading system for household water meters based on Zigbee.

Background technique

In recent years, with the rapid development of computer technology, network technology and microelectronic technology, more and more new technologies have been applied to automatic meter reading systems, especially the development of wireless low-power transmission technology. The wireless meter reading system developed in recent years has gradually become the main development trend of the meter reading system due to its advantages of high work efficiency, accurate and real-time data reading, convenient installation and no need to enter the meter reading system. The main representative wireless methods are infrared, bluetooth, GPRS and Zigbee. Because the wireless meter reading network has the characteristics of large number of nodes, small data flow and strong real-time performance, factors such as cost, power consumption and network scalability must be considered when choosing wireless communication technology. Compared with several other wireless communication technologies, Zigbee is a wireless communication technology based on IEEE802. High reliability, security and self-organization capabilities, support for large network capacity.

Utility model content

The technical problem to be solved by the utility model is: the utility model provides a Zigbee-based household water meter meter reading system, which can collect water meter data in a wide range at regular intervals.

In order to solve the above technical problems, the technical solution adopted by the utility model is:

The utility model provides a Zigbee-based household water meter reading system, including a water meter, a collector, a repeater, a concentrator, and a remote server;

The collector includes a microcontroller, a first storage device, a first Zigbee communication module, a first radio frequency module, an RS485 interface, an infrared interface and a first power supply module; the first storage device is connected to the microcontroller; The microcontroller is connected with the first Zigbee communication module; the first Zigbee communication module is connected with the repeater through the first radio frequency module; the microcontroller is connected through the RS485 interface or the The infrared interface is connected to the water meter; the microcontroller is connected to the mains through the first power module;

The repeater includes a second Zigbee communication module, a second radio frequency module, and a second power supply module; the second Zigbee communication module is connected to the second radio frequency module; the second radio frequency module is connected to more than one of the acquisition The device is connected; the second power supply module is connected to the mains;

Described concentrator comprises PIC single-chip microcomputer, the second storage device, the 3rd Zigbee communication module, the 3rd radio frequency module, GPRS module, power module; Described PIC single-chip microcomputer is connected with described second storage device; Through described 3rd Zigbee communication The module is connected with more than one repeater; the PIC single-chip microcomputer is connected with the remote server through the GPRS module; the PIC single-chip microcomputer is connected with the third Zigbee communication module; the third Zigbee communication module is connected through the third Zigbee communication module The three radio frequency modules are connected to more than one collector.

The beneficial effect of the utility model is that: the meter reading system provided by the utility model has the characteristics of both distributed and centralized, can complete the data timing collection of each water meter unit, and has multiple centralized reading functions such as unicast, multicast, broadcast, etc. Way. The meter reading system is composed of a remote server, Zigbee network, GPRS network and smart water meters, and generally forms a three-layer distributed structure of data acquisition layer, data transmission layer, and water meter monitoring management layer. The remote wireless meter reading system designed by combining Zigbee and GPRS brings benefits and convenience to users and enterprises. The main advantages include reducing the labor intensity and reducing the cost of meter reading; The problem of statistical difficulties caused by different meters can improve the level of management system and economic benefits; through the remote server, the situation of water meter nodes can be monitored in time and problems can be found and solved at any time.

Description of drawings

Fig. 1 is the structural block diagram of the specific embodiment of a kind of household water meter reading system based on Zigbee that the utility model provides;

Fig. 2 is the structural block diagram of the specific embodiment of the collector provided by the utility model;

Fig. 3 is the structural block diagram of the specific embodiment of the repeater provided by the utility model;

Fig. 4 is the structural block diagram of the specific embodiment of the concentrator provided by the utility model;

Fig. 5 is the structural diagram of the three-layer distributed meter reading system provided by the utility model;

Fig. 6 is the connection diagram of collector and water meter provided by the utility model;

Label description:

1. Water meter; 2. Collector; 21. Microcontroller; 22. First storage device;

23. The first Zigbee communication module; 24. The first radio frequency module; 25. RS485 interface;

26. Infrared interface; 27. The first power module; 28. The first USB interface; 3. Repeater;

31. The second Zigbee communication module; 32. The second radio frequency module; 33. The second power supply module;

4. Concentrator; 41. PIC microcontroller; 42. Second storage device;

43. The third Zigbee communication module; 44. The third radio frequency module; 45. GPRS module;

46. The third power supply module; 47. The second USB interface; 5. The remote server.

detailed description

In order to describe the technical content, the achieved purpose and the effect of the present utility model in detail, the following will be described in conjunction with the embodiments and accompanying drawings.

The most critical idea of the utility model is that the meter reading system is composed of a remote server, Zigbee network, GPRS network and smart water meter, forming a three-layer distributed structure of data collection layer, data transmission layer and water meter monitoring management layer as a whole.

Glossary:

Collector Used to get data from water meter Concentrator Used to obtain the water meter data stored in the storage module of the collector repeater Used to forward the data sent by the collector to the concentrator

Please refer to Figure 1 to Figure 6,

The utility model provides a Zigbee-based household water meter meter reading system, including a water meter 1, a collector 2, a repeater 3, a concentrator 4, and a remote server 5;

Described collector 2 comprises microcontroller 21, first memory device 22, first Zigbee communication module 23, first radio frequency module 24, RS485 interface 25, infrared interface 26 and first power module 27; Described first memory device 22 is connected with the microcontroller 21; the microcontroller 21 is connected with the first Zigbee communication module 23; the first Zigbee communication module 23 is connected with the repeater 3 by the first radio frequency module 24 Connection; the microcontroller 21 is connected to the water meter 1 through the RS485 interface 25 or the infrared interface 26; the microcontroller 21 is connected to the mains through the first power module 27;

Described repeater 3 comprises the second Zigbee communication module 31, the second radio frequency module 32, the second power module 33; Described second Zigbee communication module is connected with described second radio frequency module; Described second radio frequency module is connected with a The above collector is connected; the second power supply module is connected to the mains;

Described concentrator 4 comprises PIC single-chip microcomputer 41, the second storage device 42, the 3rd Zigbee communication module 43, the 3rd radio frequency module 44, GPRS module 45, the 3rd power supply module 46; Described PIC single-chip microcomputer 41 and described second storage Device 42 is connected; Described PIC single-chip microcomputer 41 is connected with remote server 5 by described GPRS module 45; Described PIC single-chip microcomputer 41 is connected with described 3rd Zigbee communication module 43; Described 3rd Zigbee communication module 43 is connected by described 3rd Zigbee communication module 43. The radio frequency module 44 is connected to more than one repeater 3; the PIC microcontroller 41 is connected to the mains through the second power supply module 46.

Further, the collector 2 also includes a first USB interface 28 ; the first USB interface 28 is connected to the microcontroller 21 .

It can be seen from the above description that when the network or equipment fails, the concentrator cannot obtain the data in the collector. The corresponding data can be obtained from the first storage device of the water meter, and the water meter data can be copied conveniently.

Further, the concentrator 4 also includes a second USB interface 47 ; the second USB interface 47 is connected to the PIC microcontroller 41 .

It can be seen from the above description that when the network or equipment fails, the remote server cannot obtain the data in the concentrator. The corresponding data can be obtained from the second storage device of the water meter, and the water meter data can be copied conveniently.

Further, the models of the first Zigbee communication module, the second Zigbee communication module and the third Zigbee communication module are CC2530.

Further, the model of the microcontroller is 8051MCU.

Further, the first storage device includes 8K RAM and 256KB Flash.

Further, the models of the first radio frequency module, the second radio frequency module and the third radio frequency module are CC2591.

It can be seen from the above description that the signal is amplified by the CC2591 radio frequency amplifier integrated circuit to expand the communication range, thereby expanding the wireless application distance of the Zigbee network.

Further, the model of the PIC microcontroller is PIC24FJ128GA308.

It can be seen from the above description that the PIC24FJ128GA308 chip adopts a 16-bit improved Harvard architecture, and the maximum operating speed can reach 32MHz. The chip comes with 128K flash memory, 8K SRAM, RTCC, 2 SPI modules, 4 uart modules, 32-bit CRC generator, 24-channel AD converter, and ultra-low power consumption for deep sleep.

Further, the model of the GPRS module is M35.

It can be seen from the above description that the standby current of the M35 module is as low as 0.9mA, and the embedded network service protocol stack supports multiple IP addresses. The single-chip microcomputer completes the control of the M35 module through the AT command, and the M35 module transmits the water meter data to the remote server based on the TCP/IP protocol.

Further, the second storage device is an AT45DB161D serial interface flash memory chip.

It can be seen from the above description that the AT45DB161D serial interface flash memory chip has a storage space of 2M bytes, an SPI interface, and a speed of up to 66Mhz.

Example:

A Zigbee-based household water meter reading system, including water meters, collectors, repeaters, concentrators, and remote servers;

The collector includes microcontroller 8051MCU, first storage device 8KRAM and 256KB Flash, first USB interface, first Zigbee communication module CC2530, first radio frequency module CC2591, RS485 interface, infrared interface and first power supply module; The first storage device 8KRAM and 256KB Flash, the first USB interface are respectively connected with the microcontroller 8051MCU; the microcontroller 8051MCU is connected with the first Zigbee communication module CC2530; the first Zigbee communication module CC2530 The first RF module CC2591 is connected to the repeater; the microcontroller 8051MCU is connected to the water meter through the RS485 interface or the infrared interface; the microcontroller 8051MCU is connected to the first power supply The module is connected to the mains;

The repeater includes a second Zigbee communication module CC2530, a second radio frequency module CC2591, and a second power supply module; the second Zigbee communication module is connected to the second radio frequency module CC2591; the second radio frequency module CC2591 is connected to a The above collector is connected; the second power supply module is connected to the mains;

Described concentrator comprises PIC single-chip microcomputer PIC24FJ128GA308, the second storage device AT45DB161D serial interface flash memory chip, the second USB interface, the 3rd Zigbee communication module CC2530, the 3rd radio frequency module CC2591, GPRS module M35, power supply module; The device AT45DB161D serial interface flash memory chip and the second USB interface are respectively connected with the PIC microcontroller PIC24FJ128GA308; the third Zigbee communication module CC2530 is connected with more than one repeater; the PIC microcontroller PIC24FJ128GA308 passes through the The GPRS module M35 is connected with the remote server; the PIC microcontroller PIC24FJ128GA308 is connected with the third Zigbee communication module CC2530; the third Zigbee communication module is connected with one or more collectors through the third radio frequency module CC2591.

The structural diagram of the three-layer distributed meter reading system is shown in Figure 5 and Figure 6. The collector of the data collection layer realizes the collection of household water meter data and other meter information through RS485 or infrared. In order to reduce power consumption, the collector uses Breathing works. The data transmission layer repeater is responsible for forwarding the collected water meter information of each collector, and finally summarizes it to the concentrator; the concentrator completes the conversion of Zigee network and GPRS network data, collects the information forwarded by the repeater, summarizes it and passes it through GPRS The public network transmits data to remote servers. The downlink and uplink of the entire meter reading system are basically similar.

In the meter reading system, the data collector communicates uplink with the repeater and downlink with the water meter. The collector can collect data from multiple smart household water meters, upload the data to the data repeater, and receive data and instructions from the data repeater and send it to the smart household water meter. The Zigbee wireless network of the collector adopts the high-performance and low-power chip CC2530 launched by TI. The chip conforms to IEEE802.15.4 standard 2.4Ghz radio frequency transceiver, and enhanced 8051MCU, 8KRAM and 256KB Flash. The collector collects the water information of household water meters through infrared and RS485. And send it to the repeater through the CC2591 RF module. The invention amplifies the signal through the CC2591 radio frequency amplifier integrated circuit to expand the communication range.

The repeater node is responsible for the establishment and maintenance of routes between nodes in the Zigbee network. It is a data forwarding device between the data collector and the concentrator. It transfers the data to be uploaded in the data collector to the concentrator, and at the same time sends the The control instructions are transferred to the collector, and a repeater is placed in a certain area to ensure that the signal covers the entire network. The repeater node is mainly composed of CC2530 chip and CC2591 RF front-end and battery module. The CC2591 radio frequency front end expands the wireless application distance of the Zigbee network.

The concentrator is the aggregator of all data within a certain area in the Zigbee network. A district of the meter reading system has only one concentrator, which can theoretically connect 1,000 smart water meters. The concentrator collects and stores the water meter information forwarded by the repeater, and can store data for up to one year. Regularly send data to the remote server through the GPRS module, receive commands from the remote server, and forward them to the data collector. The concentrator mainly consists of CC2530, CC2591, PIC24 microcontroller, GPRS module, data memory and so on. The transmit power of CC2530 itself is small, in order to meet the requirements of practical applications. To expand the network coverage, the CC2591 RF front-end chip is added on the basis of the CC2530 chip to amplify the output power. CC2591 is a high-performance, low-power RF front-end chip from TI. With CC2591, the Zigbee network communication distance can reach more than 600m. The PIC microcontroller adopts the PIC24FJ128GA308 chip, which adopts a 16-bit improved Harvard architecture, and the maximum operating speed can reach 32MHz. The chip comes with 128K flash memory, 8K SRAM, RTCC, 2 SPI modules, 4 uart modules, 32-bit CRC generator, 24-channel AD converter, and ultra-low power consumption for deep sleep. The GPRS module adopts M35 quad-band GSM/GPRS module. The standby current is as low as 0.9mA, and the network service protocol stack is embedded to support multiple IP addresses. The single-chip microcomputer completes the control of the M35 module through the AT command, and the M35 module transmits the water meter data to the remote server based on the TCP/IP protocol. Data Flash adopts AT45DB161D serial interface flash memory chip. The storage space is 2M bytes, SPI interface, the speed can reach 66Mhz.

To sum up, the Zigbee-based household water meter reading system provided by the utility model has both distributed and centralized characteristics, can complete the data timing collection of each water meter unit, and has unicast, multicast, broadcast, etc. A variety of collection and copying methods. The meter reading system is composed of a remote server, Zigbee network, GPRS network and smart water meters, and generally forms a three-layer distributed structure of data acquisition layer, data transmission layer, and water meter monitoring management layer. The remote wireless meter reading system designed by combining Zigbee and GPRS brings benefits and convenience to users and enterprises. The main advantages include reducing the labor intensity and reducing the cost of meter reading; Statistical difficulties caused by different meters, improve the level of management system and economic benefits; through the management of the water meter centralized reading center, timely monitor the status of water meter nodes and find and solve problems at any time.

The above is only an embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent transformations made by using the utility model specification and accompanying drawings, or directly or indirectly used in related technical fields, are all the same. The theory is included in the patent protection scope of the present utility model.

Claims (10)

1. A household water meter meter reading system based on Zigbee, is characterized in that, comprises water meter, collector, repeater, concentrator, remote server; The collector includes a microcontroller, a first storage device, a first Zigbee communication module, a first radio frequency module, an RS485 interface, an infrared interface and a first power supply module; the first storage device is connected to the microcontroller; The microcontroller is connected with the first Zigbee communication module; the first Zigbee communication module is connected with the repeater through the first radio frequency module; the microcontroller is connected through the RS485 interface or the The infrared interface is connected to the water meter; the microcontroller is connected to the mains through the first power module; The repeater includes a second Zigbee communication module, a second radio frequency module, and a second power supply module; the second Zigbee communication module is connected to the second radio frequency module; the second radio frequency module is connected to more than one of the acquisition The device is connected; the second power supply module is connected to the mains; Described concentrator comprises PIC single-chip microcomputer, the second storage device, the 3rd Zigbee communication module, the 3rd radio frequency module, GPRS module, power module; Described PIC single-chip microcomputer is connected with described second storage device; Through described 3rd Zigbee communication The module is connected with more than one repeater; the PIC single-chip microcomputer is connected with the remote server through the GPRS module; the PIC single-chip microcomputer is connected with the third Zigbee communication module; the third Zigbee communication module is connected through the third Zigbee communication module The three radio frequency modules are connected to more than one collector. 2. The household water meter reading system based on Zigbee according to claim 1, wherein the collector also includes a first USB interface; the first USB interface is connected with a microcontroller. 3. The household water meter reading system based on Zigbee according to claim 1, wherein the concentrator also includes a second USB interface; the second USB interface is connected with a PIC microcontroller. 4. the household water meter reading system based on Zigbee according to claim 1, is characterized in that, the model of described first Zigbee communication module, described second Zigbee communication module and described 3rd Zigbee communication module is CC2530 . 5. the household water meter meter reading system based on Zigbee according to claim 1, is characterized in that, the model of described microcontroller is 8051MCU. 6. The household water meter reading system based on Zigbee according to claim 1, wherein the first storage device comprises 8KRAM and 256KB Flash. 7. The Zigbee-based household water meter reading system according to claim 1, wherein the model of the first radio frequency module, the second radio frequency module and the third radio frequency module is CC2591. 8. The household water meter reading system based on Zigbee according to claim 1, wherein the model of the PIC microcontroller is PIC24FJ128GA308. 9. The household water meter meter reading system based on Zigbee according to claim 1, wherein the model of the GPRS module is M35. 10. The household water meter reading system based on Zigbee according to claim 1, wherein the second storage device is an AT45DB161D serial interface flash memory chip.