CN202331781U - Wireless meter reading device based on WIA wireless network - Google Patents

Wireless meter reading device based on WIA wireless network Download PDF

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Publication number
CN202331781U
CN202331781U CN2011205036586U CN201120503658U CN202331781U CN 202331781 U CN202331781 U CN 202331781U CN 2011205036586 U CN2011205036586 U CN 2011205036586U CN 201120503658 U CN201120503658 U CN 201120503658U CN 202331781 U CN202331781 U CN 202331781U
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China
Prior art keywords
circuit
wireless
antenna
copy
meter
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CN2011205036586U
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Inventor
王忠锋
于海斌
顾洪群
王英男
黄剑龙
张宏宇
李力刚
朱珍
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Shenyang Institute of Automation of CAS
Shenyang Power Supply Co of State Grid Liaoning Electric Power Co Ltd
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Shenyang Institute of Automation of CAS
Shenyang Power Supply Co of State Grid Liaoning Electric Power Co Ltd
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Abstract

The utility model relates to a wireless meter reading device and in particular to a wireless meter reading device based on a WIA wireless network. The WIA wireless network provided by the utility model utilizes a Mesh network structure, the WIA network comprises a plurality of meter reading devices which are in communication with each other, an antenna is in wireless signal communication with an upper computer; the antenna is in communication with a radio frequency receiving and sending circuit; the antenna is in signal communication with the radio frequency receiving and sending circuit through an antenna impedance matching circuit; a radio frequency receiving and sending switch controls the radio frequency receiving and sending circuit to receive and send a wireless signal through an electric level; a filter capacitor, a pull-up resistor and a pull-down resistor are arranged at the exterior of a processor circuit; and an input end is in communication with the processor circuit through a radio frequency communication circuit, and an output end is in communication with an ammeter through a serial port circuit. The radio frequency communication device provided by the utility model is in data communication with the ammeter through the serial port circuit and sends data through an external antenna in a wireless manner; and the wireless meter reading device disclosed by the utility model has the characteristics of multi-point monitoring and data collection capability, short data collection time, higher than 99% of collection success rate and greatly improved communication distance.

Description

A kind of wireless meter-copy device based on the WIA wireless network
Technical field
The utility model relates to wireless meter-copy device, is a kind of wireless meter-copy device based on the WIA wireless network specifically.
Background technology
In today that technology of Internet of things develops rapidly; The radio meter register technology has also obtained fast development; Since radio meter register have low in energy consumption, without the meter reading personnel scene go to make an inventory, the real-time of checking meter advantages of higher, so the radio meter register technology will have good application prospects in future.
In Chinese patent number 02200581.1, a kind of Automatic meter reading system that utilizes telephone wire is disclosed, this system comprises user side and management end; User side is made up of table tool, collector, data processor; The table tool is given collector with data transfer, and collector and data processor are through wireless mode transmission data, and the wireless transmit frequency is about 400MHz; Data processor and management end are realized automatic data logging through telephone wire transmission data.The deficiency of this system is that radio meter register is confined in the scope of user side, requires the user must have the hardware condition of telephone wire, is not suitable for to be installed in outdoor checking meter greatly.
In Chinese patent numbers 96202204.7; A kind of multi-user's coal gas, electricity, table tool automatic meter number recorder are disclosed; It all installs a user data collecting unit in the turned position of each customer meter; Through the monitoring device, conversion of signals is become electric impulse signal, pulse signals is carried out stored count; Be aggregated into a data centralized processing unit at each data acquisition unit, infrared copying instrument through the control data centralized processing unit to the accumulated result of each data acquisition unit read, zero clearing.Infrared copying instrument is exported the data that read through output interface to other devices.This technology adopts infrared mode transmission data, has defectives such as transmission range is short, signal transmission instability, and still needs manual metering, can not tackle the problem at its root.
In Chinese patent numbers 200810207546.9, a kind of technology of carrying out radio meter register with GPRS is disclosed.Processor is gathered the data of ammeter, gives background server through GPRS network with data transfer then.The weak point of this system is that all will pay certain expense to common carrier every year owing to adopt the GPRS network technology.
It is not enough to be directed to above shortcoming; The utility model provides a kind of less radio-frequency device; WIA wireless network kilowatt meter reading-out system by this device constitutes can be good at solving above deficiency, and it supports the communication of multi-hop (Multi-hop), equity (Peer to Peer); Have autonomous networking, characteristics such as network size is variable, node can be disposed in a large number, unmanned, simultaneously can reduce node energy consumption through dormancy mechanism.
The utility model content
Deficiencies such as the transmission range that exists in the prior art is short in order to overcome, signal transmission instability, cost of use costliness, the purpose of the utility model provides a kind of remote-wireless meter copying device.This device combines wireless communication technology and radio circuit technology; And merged the Antenna Design of own uniqueness; Design a radio communication device, this device can be good at accomplishing collection, transmission and the reception of meter reading data, replaces conventional artificial to register one's residence and checks meter.
To achieve these goals, the technical scheme of the utility model is following:
Said WIA wireless network adopts the Mesh network structure, comprises a plurality of meter copying devices that communicate between mutually in the WIA network, and said wireless meter-copy device comprises:
Antenna: the input end and the RF transmit-receive circuit of said antenna communicates, output terminal and host computer carry out communicating wireless signals;
RF transmit-receive circuit: antenna and RF transmit-receive circuit carry out communicating wireless signals through antenna impedance matching;
The radio-frequency receiving-transmitting switch: said radio-frequency receiving-transmitting switch receives, sends wireless signal through high-low level control RF transmit-receive circuit;
Processor circuit: core is the STM32F103C8T6 chip, outside for filter capacitor and on draw, pull down resistor; Processor circuit and ammeter communicate through serial port circuit;
Power circuit: be whole device power supply.
RF transmit-receive circuit is made up of transceiver controller, rf filtering circuit and high-pass filtering electric capacity.
Rf filtering circuit and high-pass filtering electric capacity constitute wireless signal reception, transtation mission circuit; Said wireless signal receiving circuit is made up of capacitor C R1~CR2, inductance L R; The wireless signal transtation mission circuit is made up of capacitor C C1, CM, CH, C0, inductance L M, LH, L0, LC, LR, resistance R DC.
The core of transceiver controller is the Si4432 chip.
Antenna impedance matching comprises that capacitor C M2~CM3, inductance L M2 tightly put the composition pi-network, and capacitor C C2 and capacitor C M2 are tightly put; The conductor length of the lead that capacitor C M3 comes out and the Connection Block of antenna is 3.25 millimeters, and width is 0.46 millimeter.
Antenna is built in the wireless meter-copy device, and antenna is connected with radio communication device Great Wall Software cable; Antenna feed impedance is 50 Ω, and voltage standing wave ratio (VSWR) is less than 2.5, and the electromagenetic wave radiation direction is an omnidirectional, can bear peak power output 5W.
Wireless meter-copy device also comprises memory circuit, and the input end of memory circuit links to each other with processor circuit; The core of memory circuit is the M25P10-A chip; As the pull-up resistor of data line, R9 is as the pull down resistor of clock line respectively for R6, R7, R8, and C5 is as power supply and the filter capacitor that keeps pin.
The input voltage of power circuit is 12V, through exporting 5V voltage through LM2594M-5.0 after TVS1 protection, the C1 filtering; The 5V voltage of output is through L1, C2, C3 filtering, converts the 3.3V signal to after exporting to the MP1700T power supply chip, is system's power supply.
Said interface circuit comprise JTAG debug circuit, status indicator lamp circuit, with ammeter communication serial port circuit and reset circuit.
The utility model can be used for the data acquisition and the transmission of radio meter register, and it combines wireless communication technology and radio circuit design, adds unique Antenna Design, has well solved the drawback that traditional dependence manual work is registered one's residence and checked meter and bring.This meter copying device has following advantage:
1. can carry out multi-point monitoring and data acquisition.Because the utility model has adopted the multi-hop technology, can make the antenna on the different radio meter copying device that the signal that collects is delivered to background server (host computer) through concentrator.
2. long transmission distance.Because the utility model has adopted the design that connects antenna and wireless meter-copy device at wireless meter-copy device set inside flexible cord cable, make the communication distance of wireless meter-copy device significantly improve on the original basis.Frequency communication devices in the wireless kilowatt meter reading-out system of the utility model research and development is the hardware platform of cordless communication network, and this installs outdoor visual transmission range and can reach more than 1000 meters, and in common steel reinforced concrete dwelling house, signal can pass to the 6th buildings from Stall.
3. the utility model is a frequency communication devices independently, carries out data communication through serial line interface and ammeter, with wireless mode data is being sent; The traditional dependence power line carrier or the mode of infrared copy meter have been substituted.
4. the utility model is applied in the power meter reading system, has replaced conventional artificial to register one's residence and has checked meter, and has low-power consumption, the real-time of a checking meter height, the high accuracy for examination of checking meter, and is convenient to power administration user's electricity consumption data are managed.Adopt autonomous networking technology, be convenient to the expansion of system scale.
Description of drawings
Fig. 1 is the wireless meter-copy device communication mode synoptic diagram of a kind of wireless meter-copy device based on the WIA wireless network of the utility model;
Fig. 2 is the wireless meter-copy device structural representation of a kind of wireless meter-copy device based on the WIA wireless network of the utility model;
Fig. 3 is the power circuit principle figure of a kind of wireless meter-copy device based on the WIA wireless network of the utility model;
Fig. 4 is the antenna impedance matching schematic diagram of a kind of wireless meter-copy device based on the WIA wireless network of the utility model;
Fig. 5 is the RF transmit-receive circuit schematic diagram of a kind of wireless meter-copy device based on the WIA wireless network of the utility model;
Fig. 6 is the radio-frequency receiving-transmitting on-off principle figure of a kind of wireless meter-copy device based on the WIA wireless network of the utility model;
Fig. 7 is the processor circuit schematic diagram of a kind of wireless meter-copy device based on the WIA wireless network of the utility model;
Fig. 8 is the memory circuitry schematic diagram of a kind of wireless meter-copy device based on the WIA wireless network of the utility model;
Fig. 9 is the interface circuit schematic diagram of a kind of wireless meter-copy device based on the WIA wireless network of the utility model.
A kind of wireless meter-copy device based on the WIA wireless network of the utility model comprises following a few partial circuit: power circuit (Fig. 3), impedance matching circuit (Fig. 4), RF transmit-receive circuit (Fig. 5), radio-frequency receiving-transmitting switch (Fig. 6), processor circuit (Fig. 7), memory circuit (Fig. 8) and interface circuit (Fig. 9).
Embodiment
Below in conjunction with Figure of description and specific embodiment the utility model is done further explain.
Embodiment 1:
As shown in Figure 1; Wireless meter-copy device communication mode synoptic diagram based on wireless network; This synoptic diagram has shown that the communication mode of the network of the utility model wireless meter-copy device is divided into two parts: a part is a uplink communication; Be concentrator and being connected of background server (host computer), adopt the McWill radio network technique; Another part is a downlink communication, i.e. being connected of concentrator and ammeter terminal, adopt the WIA radio network technique.Wherein, Background server (host computer) is formed star-like wireless network with concentrator, and the Mesh network structure is formed at concentrator and ammeter terminal, and the frequency communication devices at ammeter terminal not only can be responsible for data acquisition and transmission; The function that also has relaying can be transmitted data.
Said WIA wireless network adopts the Mesh network structure, comprises a plurality of meter copying devices that communicate between mutually in the WIA network,
As shown in Figure 2, wireless meter-copy device comprises: parts such as antenna, RF transmit-receive circuit, radio-frequency receiving-transmitting switch, processor circuit and power circuit.
Wherein, the input end of antenna and host computer carry out communicating wireless signals, output terminal and RF transmit-receive circuit and communicate.Under the situation that guarantees communication distance, reduce the size of antenna as far as possible, to guarantee to be installed in the device, antenna size is merely 66*7.5*1 (unit: mm).Antenna and radio communication device are through being connected less than 5 centimeter length flexible cord cables.Input impedance is 50 ohm, and voltage standing wave ratio (VSWR) is less than 2.5, and the electromagenetic wave radiation direction is an omnidirectional, can bear peak power 5W.Input signal all carries out data transmission through antenna with the output signal.Antenna is built in the wireless meter-copy device, and antenna is connected with radio communication device Great Wall Software cable; Antenna feed impedance is 50 Ω, and voltage standing wave ratio (VSWR) is less than 2.5, and the electromagenetic wave radiation direction is an omnidirectional, can bear peak power output 5W.
Because the utility model has adopted the design that connects antenna and wireless meter-copy device at wireless meter-copy device set inside flexible cord cable, make the communication distance of wireless meter-copy device significantly improve on the original basis.Frequency communication devices in the wireless kilowatt meter reading-out system of the utility model is the hardware platform of cordless communication network, and this installs outdoor visual transmission range and can reach more than 1000 meters, and in common steel reinforced concrete dwelling house, signal can pass to the 6th buildings from Stall.
As shown in Figure 3, the input voltage of power circuit (U1) power circuit is 12V, through exporting 5V voltage through LM2594M-5.0 after TVS1 protection, the C1 filtering; The 5V voltage of output is through L1, C2, C3 filtering, converts the 3.3V signal to after exporting to the MP1700T power supply chip, is whole device power supply.
Antenna and RF transmit-receive circuit carry out communicating wireless signals through antenna impedance matching.As shown in Figure 4, antenna impedance matching comprises that capacitor C M2~CM3, inductance L M2 tightly put the composition pi-network, and capacitor C C2 and capacitor C M2 are tightly put; The conductor length of the lead that capacitor C M3 comes out and the Connection Block of antenna is 3.25 millimeters, and width is 0.46 millimeter.And 0402 standard is all used in the encapsulation of all electric capacity, inductance component.
Shown in Fig. 5~6, (U4, UPG2214TB) high-low level control RF transmit-receive circuit receives, sends wireless signal to the radio-frequency receiving-transmitting switch.RF transmit-receive circuit transceiver controller (U3), rf filtering circuit and high-pass filtering electric capacity constitute.The core of transceiver controller (U3) is the Si4432 chip.Rf filtering circuit and high-pass filtering electric capacity constitute wireless signal reception, transtation mission circuit; Wireless signal receiving circuit is made up of capacitor C R1~CR2, inductance L R; The wireless signal transtation mission circuit is made up of capacitor C C1, CM, CH, C0, inductance L M, LH, L0, LC, LR, resistance R DC; The main filtering of being responsible for radiofrequency signal; PCB layout requires the layout of electric capacity, inductance, resistance will try one's best closely, and 0402 standard is adopted in encapsulation.
As shown in Figure 7, the core of processor circuit (U5) is the STM32F103C8T6 chip, outside for filter capacitor and on draw, pull down resistor; Input end is communicated by letter with rf processing circuitry through interface circuit, and output terminal and ammeter communicate through serial port circuit.The periphery only need a spot of filter capacitor and on draw, pull down resistor.0402 standard is adopted in electric capacity, resistance encapsulation.
As shown in Figure 8, a kind of wireless meter-copy device based on the WIA wireless network of the utility model comprises that also the input end of memory circuit (U6) links to each other with processor circuit; The core of said memory circuit is the M25P10-A chip; As the pull-up resistor of data line, R9 is as the pull down resistor of clock line respectively for R6, R7, R8, and C5 is as power supply and the filter capacitor that keeps pin.
As shown in Figure 9, interface circuit comprise JTAG debug circuit, status indicator lamp circuit, with ammeter communication serial port circuit and reset circuit.
The content of the utility model is the frequency communication devices in the WIA wireless network, and is shown in Figure 2, the frequency communication devices structural drawing.This utility model comprises power circuit, impedance matching circuit, RF transmit-receive circuit, radio-frequency receiving-transmitting switch, processor circuit, memory circuit, interface circuit and antenna etc.
Circuit receiving data stream journey: wireless signal is received by antenna; Through behind the antenna impedance matching; Signal is passed to RF transmit-receive circuit, and the information that RF transmit-receive circuit arrives through demodulate reception passes to processor with wireless signal with the mode of digital signal; Processor is passing to instruction in the ammeter, accomplishes the receiving course of a wireless signal; Circuit sends data flow; The data that processor will send send to RF transmit-receive circuit through the serial sync cap; RF transmit-receive circuit is being modulated into radio wave signal with signal, through antenna-matching circuit signal is sent through antenna, accomplishes one time data transmission procedure.Power circuit is responsible for the power supply of total system.Memory circuit is responsible for the storage of relevant meter reading data.
Like Fig. 2, be the utility model wireless meter-copy device structural drawing.The radio communication wireless meter-copy device is installed on each terminal ammeter, is responsible for the data of terminal ammeter are gathered, transmitted, and can receive the meter reading instruction that background server sends simultaneously, carries out the action of checking meter.
Wireless meter-copy device is made up of following several partial circuits: power circuit (Fig. 3), impedance matching circuit (Fig. 4), radio frequency communications circuitry (Fig. 5), RF transmit-receive circuit (Fig. 6), processor circuit (Fig. 7), memory circuit (Fig. 8) and peripheral interface circuit (Fig. 9) etc.Wherein power circuit, processor circuit, memory circuit are prior art, do not do narration at this.
The workflow of the utility model wireless meter-copy device is following:
DRP data reception process:
Under the system default situation, wireless meter-copy device is in accepting state; The chip Si4432 of transceiver controller (U3) is the V1 pin of GPIO1 control radio-frequency receiving-transmitting switch (UPG2214TB) switch through pin 8, and as GPIO1 when being low level, GPIO2 is in high level, and wireless meter-copy device is in accepting state.Radio wave signal receives through antenna; Through antenna-matching circuit LM2, CM2, CM3, pass through CC2, CR2 filter capacitor again, in Si4432, accomplish the work of signal demodulation; Signal becomes digital signal by simulating signal; Be connected with processor through serial line interface RF_IRQ, RF_SS, RF_SCK, RF_MOSI, RF_MISO, processor is being that processor pin 30 sends to ammeter with pin 31 through serial ports 1 with the order data that receives, and the data of ammeter are read; The ammeter data that reads is sent to processor through serial ports 1, prepare data and send.
Data transmission procedure:
Processor will send to Si4432 through serial line interface RF_IRQ, RF_SS, RF_SCK, RF_MOSI, RF_MISO from the data that ammeter reads back; The data-modulated that Si4432 will send becomes simulating signal to open the radio frequency transmit button simultaneously; Be that GPIO2 is a low level, GPIO1 is a high level.The signal that modulates sends through the pin two of Si4432; The filtering match circuit that T-shape high-pass filtering circuit that process C0, L0, LM, CC1 and CM form and LH, CH, RH form; Pass through the OUT2 pin of RF switch UPG2214TB again; Export to antenna through CC2 high-pass filtering and LM2, CM2, CM3 antenna impedance matching, accomplish the transmission of a secondary data.
What need understand is: though the foregoing description is to the utility model detailed explanation of contrasting; But these explanations are the simple declaration to the utility model; Rather than to the restriction of the utility model; Any utility model that does not exceed the utility model connotation is created, and all falls in the protection domain of the utility model.

Claims (9)

1. wireless meter-copy device based on the WIA wireless network is characterized in that: said WIA wireless network adopts the Mesh network structure, comprises a plurality of meter copying devices that communicate between mutually in the WIA network, and said wireless meter-copy device comprises:
Antenna: input end and RF transmit-receive circuit communicate, output terminal and host computer carry out communicating wireless signals;
RF transmit-receive circuit: antenna and RF transmit-receive circuit carry out communicating wireless signals through antenna impedance matching;
Radio-frequency receiving-transmitting switch U4: said radio-frequency receiving-transmitting switch receives, sends wireless signal through high-low level control RF transmit-receive circuit;
Processor circuit U5: core is the STM32F103C8T6 chip, outside for filter capacitor and on draw, pull down resistor; Input end is communicated by letter with rf processing circuitry through interface circuit, and output terminal and ammeter communicate through serial port circuit;
Power circuit U1: be whole device power supply.
2. according to the described wireless meter-copy device of claim 1, it is characterized in that: said RF transmit-receive circuit is made up of transceiver controller U3, rf filtering circuit and high-pass filtering electric capacity.
3. according to the described wireless meter-copy device of claim 2, it is characterized in that: said rf filtering circuit and high-pass filtering electric capacity constitute wireless signal reception, transtation mission circuit; Said wireless signal receiving circuit is made up of capacitor C R1~CR2, inductance L R; The wireless signal transtation mission circuit is made up of capacitor C C1, CM, CH, C0, inductance L M, LH, L0, LC, LR, resistance R DC.
4. according to the described wireless meter-copy device of claim 2, it is characterized in that: the core of said transceiver controller U3 is the Si4432 chip.
5. according to the described wireless meter-copy device of claim 1, it is characterized in that: said antenna impedance matching comprises that capacitor C M2~CM3, inductance L M2 tightly put the composition pi-network, and capacitor C C2 and capacitor C M2 are tightly put; The conductor length of the lead that capacitor C M3 comes out and the Connection Block of antenna is 3.25 millimeters, and width is 0.46 millimeter.
6. according to the said wireless meter-copy device based on the WIA wireless network of claim 1, it is characterized in that: said antenna is built in the wireless meter-copy device, and antenna is connected with radio communication device Great Wall Software cable; Antenna feed impedance is 50 Ω, and voltage standing wave ratio (VSWR) is less than 2.5, and the electromagenetic wave radiation direction is an omnidirectional, can bear peak power output 5W.
7. according to the described wireless meter-copy device of claim 1, it is characterized in that: said device comprises memory circuit U6, and the input end of memory circuit links to each other with processor circuit; The core of said memory circuit is the M25P10-A chip; As the pull-up resistor of data line, R9 is as the pull down resistor of clock line respectively for R6, R7, R8, and C5 is as power supply and the filter capacitor that keeps pin.
8. according to the described wireless meter-copy device of claim 1, it is characterized in that: the input voltage of said power circuit U1 is 12V, through exporting 5V voltage through LM2594M-5.0 after TVS1 protection, the C1 filtering; The 5V voltage of output is through L1, C2, C3 filtering, converts the 3.3V signal to after exporting to the MP1700T power supply chip, is system's power supply.
9. according to the described wireless meter-copy device of claim 1, it is characterized in that: said interface circuit comprise JTAG debug circuit, status indicator lamp circuit, with ammeter communication serial port circuit and reset circuit.
CN2011205036586U 2011-12-07 2011-12-07 Wireless meter reading device based on WIA wireless network Active CN202331781U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103150877A (en) * 2011-12-07 2013-06-12 中国科学院沈阳自动化研究所 Wireless meter reading device based on WIA wireless network
CN103187990A (en) * 2013-04-01 2013-07-03 江苏林洋电子股份有限公司 Carrier communication system and method based on impedance dynamic characteristic of power line network
CN103888271A (en) * 2012-12-19 2014-06-25 中国科学院沈阳自动化研究所 WIA-PA wireless network adapter power supply circuit
CN104503391A (en) * 2014-11-30 2015-04-08 河南省电力勘测设计院 Zone controller for heat supply network of enterprise
CN104569577A (en) * 2014-12-31 2015-04-29 北京煜邦电力技术有限公司 Household electricity utilization information acquisition system based on micropower wireless communication protocol
CN108900200A (en) * 2018-06-21 2018-11-27 厦门大学 A kind of transparent transmission wireless communication system towards industrial trade

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103150877A (en) * 2011-12-07 2013-06-12 中国科学院沈阳自动化研究所 Wireless meter reading device based on WIA wireless network
CN103888271A (en) * 2012-12-19 2014-06-25 中国科学院沈阳自动化研究所 WIA-PA wireless network adapter power supply circuit
CN103187990A (en) * 2013-04-01 2013-07-03 江苏林洋电子股份有限公司 Carrier communication system and method based on impedance dynamic characteristic of power line network
CN104503391A (en) * 2014-11-30 2015-04-08 河南省电力勘测设计院 Zone controller for heat supply network of enterprise
CN104569577A (en) * 2014-12-31 2015-04-29 北京煜邦电力技术有限公司 Household electricity utilization information acquisition system based on micropower wireless communication protocol
CN104569577B (en) * 2014-12-31 2018-12-04 北京煜邦电力技术股份有限公司 A kind of household electricity information acquisition system based on micro power radio communication agreement
CN108900200A (en) * 2018-06-21 2018-11-27 厦门大学 A kind of transparent transmission wireless communication system towards industrial trade
CN108900200B (en) * 2018-06-21 2020-12-11 厦门大学 Industrial industry-oriented transparent transmission wireless communication system

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