CN101447124A - Low power consumption remote wireless meter-reading module - Google Patents
Low power consumption remote wireless meter-reading module Download PDFInfo
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- CN101447124A CN101447124A CNA2008102075469A CN200810207546A CN101447124A CN 101447124 A CN101447124 A CN 101447124A CN A2008102075469 A CNA2008102075469 A CN A2008102075469A CN 200810207546 A CN200810207546 A CN 200810207546A CN 101447124 A CN101447124 A CN 101447124A
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Abstract
The invention relates to a low power consumption remote wireless meter-reading module which comprises a CPU control unit, a power control unit, a memory cell, an analog-digital conversion unit and a GPRS module; wherein, the power control unit, the analog-digital conversion unit and the GPRS module are connected with the CPU control unit; in the CPU control unit, an infrared windowing module opens an infrared communication window at time intervals, thereby causing the wireless reading meter module to receive data; a timer data-collecting module collects pulses of the meter reading by utilizing interrupt of a timer; a segmented collection and centralized submission module turns on the analog-digital conversion unit at a storage time to collect a working state of the meter reading, stores the working state in the memory cell, and turns on the GPRS module at an upload time to upload data; and the power control unit supplies electricity to the memory cell and the analog-digital conversion unit only at the storage time, and supplies electricity to the GPRS module at the upload time. Through the scheme, low power consumption operation of the remote wireless meter-reading module is realized.
Description
Technical field
The present invention relates to the radio meter register field, relate in particular to a kind of low power consumption remote wireless meter-reading module.
Background technology
Development along with urban construction, the residential quarter scale enlarges day by day, the table tool reads and becomes distinct issues gradually, traditional pattern of checking meter is a manual metering, main deficiency is to waste time and energy for the manual metering of checking meter greatly that disperses to distribute, checking meter breaks down is difficult in time report etc., and brought the hidden danger on the safety, therefore developing a kind of Automatic meter reading system compels not allow to delay, in the different schemes of Automatic meter reading system, wireless communication mode is because of it need not to connect up, the easy-to-install advantage is subjected to attention especially.
Wireless kilowatt meter reading-out system such as China Patent No. 96202204.7 in the prior art, a kind of multi-user's coal gas, electricity, table tool automatic meter number recorder are disclosed, it installs a user data collecting unit in the turned position of each customer meter, pass through detection means, convert turn signal to electric impulse signal, pulse signals is carried out stored count.Again each data acquisition unit is gathered and is connected to a data centralized processing unit, infrared copying instrument by 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 by output interface to other devices.This technology adopts infrared mode transmission data, and it is short to have transmission range, transmits unsettled deficiency, and still needs manual metering, can not tackle the problem at its root.
In China Patent No. 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 transfers data to collector, and collector and data processor transmit data by wireless mode, and the wireless transmit frequency is about 400MHz, data processor and management end transmit data by telephone wire, realize automatic data logging.The deficiency of this system is that wireless mode only is confined to the user side scope, requires the user must have the hardware condition of telephone wire, is not suitable for to be installed on outdoor checking meter greatly.
Realize that remote data transmit if utilize existing GPRS communication module, have and make full use of existing network, resource utilization height, transfer rate height, rate and characteristics such as can login rationally, at any time, it is simple, convenient, do not need existing line is changed, avoid manual metering, big table data are collected automatically copy, account and water yield data analysis have important and practical meanings.But this systems face some such problems: the GPRS module in the wireless meter-reading module needs higher supply voltage, when data are received and send, consume bigger electric current, and its infrared communication interface needs to accept at any time outside parameter setting, also consume more energy, and whole wireless meter-reading module is installed on the open air, adopt powered battery, how to reduce the power consumption of system, to play very big influence the serviceable life that prolongs battery to the superiority-inferiority of total system, can not well solve as the system energy consumption problem, then need frequently to change the battery of wireless meter-reading module, this is very inconvenient for the checking meter greatly of very disperseing that distribute.
In addition, the method of saving the wireless kilowatt meter reading-out system power consumption at present is as regularly opening radio frequency, tongue tube triggering etc., be to define the working time, only just can finish object run in this specific time, can not finish by on-demand instant, if run into during specific period user stays out, just can't complete operation; Must be equipped with magnet, operation steps is loaded down with trivial details, and job stability and fiduciary level are low.
Summary of the invention
Technical matters to be solved by this invention provides a kind of low power consumption remote wireless meter-reading module.
The present invention is that to solve the problems of the technologies described above the technical scheme that adopts be a kind of low power consumption remote wireless meter-reading module, comprise CPU control module, power control unit, storage unit, AD conversion unit and GPRS module, this wherein this power control unit, AD conversion unit and GPRS module connect this CPU control module, this CPU control module comprises:
The infrared module of windowing is opened an infrared communication window at set intervals, makes described wireless meter-reading module carry out Data Receiving;
Timer image data module is utilized the interruption collection of the timer pulse of checking meter; And
Reporting module is concentrated in the segmentation collection, opens described AD conversion unit with check meter duty and be stored in described storage unit of collection a storage time, and opens the wireless data of uploading of described GPRS module in a uplink time;
Described power control unit only this storage time to described storage unit, AD conversion unit power supply, and only at this uplink time to described GPRS module for power supply.
In above-mentioned low power consumption remote wireless meter-reading module, the infrared module of windowing has: IrdaIdle0, IrdaIdle1, IrdaWtSTX, IrdaReady, IrdaEnd, IrdaStop, seven kinds of infrared states of IrdaAck; Described IrdaIdle0 infrared state is represented infrared idle condition;
Infrared first negative edge of receiving of described IrdaIdle1 infrared state representative, and wait for begin symbol;
The infrared begin symbol of having received of described IrdaWtSTX infrared state representative, wait byte communication symbol mark signal;
The infrared STX signal of having received of described IrdaReady infrared state representative, the received communication data;
Infrared byte communication symbol mark signal or the end mark received of described IrdaEnd infrared state representative finishes communication;
Described IrdaStop infrared state represents infrared time of reception overtime, finishes communication;
The infrared enabling signal of receiving the no datat frame of described IrdaAck infrared state representative needs to send and replys.
In above-mentioned low power consumption remote wireless meter-reading module, described CPU control module adopts the CPU of low-power consumption.
In above-mentioned low power consumption remote wireless meter-reading module, described power control unit is directly powered by battery.
In above-mentioned low power consumption remote wireless meter-reading module, it is described GPRS module for power supply that described power control unit adopts high efficiency low rising switching power source chip.
The present invention has realized the low power operation of wireless kilowatt meter reading-out system owing to adopt and the infrared communication window to be set, to upload mechanism such as data and power supply low power consumption control in the set time, has saved the energy, has improved battery serviceable life largely.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 is the structural representation according to wireless kilowatt meter reading-out system of the present invention.
Fig. 2 illustrates the structured flowchart of the wireless meter-reading module of one embodiment of the invention.
Fig. 3 is the infrared state conversion synoptic diagram of one embodiment of the invention.
Fig. 4 is data acquisition, the report flow figure of one embodiment of the invention.
Fig. 5 is the power control unit electrical block diagram of one embodiment of the invention.
Fig. 6 is the infrared communication sequential chart.
Fig. 7 shows transmission signal and received signal sequential relationship.
Embodiment
Present embodiment is described a kind of low power consumption wireless meter reading system realization scheme.
See also Fig. 1, this is the structural representation of long-distance wireless meter-reading system, comprises table tool 11, is attached to wireless meter-reading module (as the wireless watermeter module) 12, hand-held set 13, wireless network 20 (as the GSM network) and account center 30 on the table tool.Wherein wireless meter-reading module sends to account center 30 via wireless network 20 in order to acquisition tables tool data.Hand-held set 13 is in order to be configured wireless meter-reading module 12 by infrared signal.
The low power dissipation design of present embodiment is primarily aimed in wireless meter-reading module 12 wherein.Please refer to Fig. 2, wireless meter-reading module 12 comprises CPU control module 202, storage unit 204 (being FLASH in the present embodiment), modulus (A/D) converting unit 206, power control unit 208, GPRS module 210, and wherein CPU control module 201 comprises that further the infrared module 212 of windowing, timer image data module 214 and segmentation collection concentrate reporting module 216.In one embodiment, these modules for example are the programs that runs in the CPU control module 201.Further describe low power dissipation design mechanism below.
See also Fig. 3, this is the infrared state conversion synoptic diagram of the infrared module 212 of windowing of present embodiment.In the present embodiment, the infrared module of windowing has IrdaIdle0, IrdaIdle1, IrdaWtSTX, IrdaReady, IrdaEnd, IrdaStop, seven kinds of infrared states of IrdaAck.Wherein:
The IrdaIdle0 infrared state is represented infrared idle condition;
Infrared first negative edge of receiving of IrdaIdle1 infrared state representative, and wait for begin symbol;
The infrared begin symbol of having received of IrdaWtSTX infrared state representative is waited for STX (byte communication symbol symbol) signal;
The infrared STX signal of having received of IrdaReady infrared state representative, the received communication data;
Infrared ETX (byte communication symbol symbol) signal or the end mark received of IrdaEnd infrared state representative finishes communication;
The IrdaStop infrared state represents infrared time of reception overtime, finishes communication;
The infrared enabling signal of receiving the no datat frame of IrdaAck infrared state representative needs to send and replys.
Conversion between each infrared state is as follows:
1, wireless meter-reading module is opened the window of a 50ms every 3 seconds, carries out Data Receiving, and state is IrdaIdle0;
If 2 receive any one negative edge, then state becomes IrdaIdle1, and receiver window is extended for 200ms simultaneously;
If 3 do not receive any data, then data stop to receive behind the 50ms, and state is IrdaStop;
4, state is IrdaIdle1, if receive a negative edge, catches the beginning flag that is not 13.36ms, and then state is reset to IrdaIdle0, and receiver window is set to 200ms simultaneously;
5, state is IrdaIdle1, if receive a negative edge, catching is the beginning flag of 13.36ms, and then state becomes IrdaWtSTX, and receiver window is set to 100ms simultaneously;
6, under the actual conditions, the frame that receives for the first time of checking meter is guiding frame, inner no datat.Receive a rising edge, the terminating symbol of catching 4.45ms, state becomes IrdaAck, and simultaneously, single-chip microcomputer withdraws from low power mode of operation;
If 7 100ms times, then data stopped to receive to the terminating symbol of still not receiving 4.45ms, state becomes IrdaStop;
8, state is IrdaAck, and single-chip microcomputer transmission response guiding frame is read really and accorded with ACK, and reenters accepting state, and enables receive window 500ms (this is a time that reenters IrdaIdle1); Repetitive process 1～5;
9, state is IrdaWtSTX, if receive in this process and the Frame sign of STX (byte communication symbol symbol) then to enable receive window 2.5s, data mode is IrdaReady;
10, state is IrdaWtSTX, if receive wrong data in this process, then is reset to state I rdaIdle0, and receive window 100ms is set;
11, state is IrdaReady, begins to receive data, if data are received ETX (byte communication symbol symbol) signal, then stops to receive, and state is IrdaEnd; If receive stop element, state also becomes IrdaEnd; Single-chip microcomputer is handled infrared data and receive window 1.5s is set and enters the next circulation that receives;
If 12 is overtime, then to accept to stop, state becomes IrdaStop.
See also Fig. 4, this is data acquisition, the report flow figure of present embodiment.Timer image data module 214 timers interrupt gathering the pulse of checking meter, and in step 401, when the 50ms timer interrupts then, (step 402) are gathered in the pulse of checking meter (for example on off operating mode of tongue tube).In step 403,, the deposit data of gathering is reported in (random access memory ram in the CPU control module) (step 404) to ephemeral data, and judged whether arrive storage time in step 405 when checking meter at interval then; Do not arrive at interval if check meter, leap to step 405 and judge whether arrive storage time.In step 405, if arrive storage time, concentrate reporting module 216 to open A/D converting unit 206 by the segmentation collection, the duty of checking meter is gathered, report to the police when unusual (step 406) appears; After collection finished, power control unit 208 can turn-off the power supply of A/D converting unit, opens FLASH 204 simultaneously, and the deposit data among the RAM is backed up (step 407) in FLASH204, preserved the power supply that the back power control unit 208 that finishes is closed FLASH 204.If do not arrive storage time, whether leaping to calls time in step 408 judgement arrives.In step 408, if call time on judging, then enter step 409, power control unit 208 is opened the power supply (with reference to Fig. 5) of GPRS module 208, and to account center 30 reported datas, reporting finishes then closes the power supply of GPRS module, waits for next time and interrupts.If on call time and do not arrive, finish, wait for next time and interrupt.
See also Fig. 5, this is the power control unit electrical block diagram of present embodiment.Power control unit 208 mainly comprises power supply unit 502, field effect transistor 504, control module 506 and Switching Power Supply 508.
Power supply unit 502 is directly powered by battery, needn't use power supply voltage stabilizing chip in addition, has got rid of the electric energy loss that is produced by the voltage stabilizing chip.Battery only directly links to each other with field effect transistor 504 with control module 506, by control module 506 control field effect transistor break-makes, is other all peripheral module power supplies.
Field effect transistor 504 for example can adopt FDS6679.Its input voltage and output voltage basically identical, power consumption is minimum.The output of field effect transistor 504 and other all peripheral modules, for example the voltage of storage unit 204, A/D converting unit 206 and GPRS module 210 input links to each other, the break-make of all the peripheral module power supplys of break-make may command by control field effect transistor 504.
Control module 506 can adopt the CPU single-chip microcomputer to constitute, and the CPU single-chip microcomputer for example can adopt the MSP430F149 chip of 16 RSIC structures of super low-power consumption.Needs CPU single-chip microcomputer according to the user can be set the time that unlimited meter-reading module transmits and receive data, and only the CPU single-chip microcomputer is just controlled field effect transistor 504 conductings when wireless transmission and reception data, and for other peripheral modules provide power supply, other times are then closed.GPRS module 210 has bigger energy consumption when work, reduced the power consumption of wireless meter-reading module in this way as much as possible.
Switching Power Supply 508 for example can adopt MAX1760, and Switching Power Supply is upgraded to 3.8V with the 3.6V voltage of input, is 210 power supplies of GPRS module.The switch power efficiency height of this low rising can reach more than 80%, simultaneously can cell voltage for the situation of 3.6V under for the GPRS module provides the voltage of 3.8V, both can allow the work of GPRS module stability, can guarantee the enforcement of powered battery scheme again.
Control module 506 utilizes the power supply of power supply output (Vout) pin of GPRS module as CPU and GPRS level match module output pull-up resistor.When CPU single-chip microcomputer and GPRS module are carried out the data transmission,, need a level match module for example can adopt OC door 508 because voltage is inconsistent.OC door 510 output voltages are consistent with the input voltage value of pull-up resistor, and GPRS module 210 itself just has power supply output (Vout) pin, the power supply that can be used for OC door pull-up resistor can save this link of power source conversion like this, has made full use of existing resource.
Present embodiment is described a kind of the employing earlier and is listened-a infrared communication that mechanism is sent out in the back course of work of windowing.Based on the mentality of designing of time-slotting, infrared reception hardware demodulation circuit is in the perception state always under the software time sequence control, and this perception is the job order of " listening-close-listen-close ".During realization, to be cut into 3 seconds working cycle the time, in these 3 seconds, infrared the window (being called for short infrared window later on) of opening 50 milliseconds, the external signal that software receives analysis in these 50 milliseconds, by the work of following step of external information judgement receiving circuit, the power consumption during perception is originally not adopt the method 1/20, and work schedule as shown in Figure 6.
When receiving with the frequency range infrared signal, the time of infrared window is by corresponding prolongation, until the infrared signal disappearance or to the maximum time window of setting (thinking to disturb).The corresponding data of receiving by software analysis then, if data are correct targeting signal then carry out processing, transmitting and receiving data request, data sending terminal begins the packet transmission after receiving request, infrared window is followed data packet length and is opened a period of time (generally greater than infrared signal delivery time 50ms), enter the perception state again after harvesting data, the time of reception sheet as shown in Figure 7.
In sum, embodiments of the invention are by being provided with the infrared communication window, uploading mechanism such as data and power supply low power consumption control in the set time, realize the low power operation of wireless kilowatt meter reading-out system, saved the energy, improved battery serviceable life largely.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (5)
1. low power consumption remote wireless meter-reading module, it is characterized in that comprising CPU control module, power control unit, storage unit, AD conversion unit and GPRS module, wherein this power control unit, AD conversion unit and GPRS module connect this CPU control module, and this CPU control module comprises:
The infrared module of windowing is opened an infrared communication window at set intervals, makes described wireless meter-reading module carry out Data Receiving;
Timer image data module is utilized the interruption collection of the timer pulse of checking meter; And
Reporting module is concentrated in the segmentation collection, opens described AD conversion unit with check meter duty and be stored in described storage unit of collection a storage time, and opens the wireless data of uploading of described GPRS module in a uplink time;
Described power control unit only this storage time to described storage unit, AD conversion unit power supply, and only at this uplink time to described GPRS module for power supply.
2. low power consumption remote wireless meter-reading module according to claim 1, it is characterized in that the described infrared module of windowing has: IrdaIdle0, IrdaIdle1, IrdaWtSTX, IrdaReady, IrdaEnd, IrdaStop, seven kinds of infrared states of IrdaAck;
Described IrdaIdle0 infrared state is represented infrared idle condition;
Infrared first negative edge of receiving of described IrdaIdle1 infrared state representative, and wait for begin symbol;
The infrared begin symbol of having received of described IrdaWtSTX infrared state representative, wait byte communication symbol mark signal;
The infrared STX signal of having received of described IrdaReady infrared state representative, the received communication data;
Infrared byte communication symbol mark signal or the end mark received of described IrdaEnd infrared state representative finishes communication;
Described IrdaStop infrared state represents infrared time of reception overtime, finishes communication;
The infrared enabling signal of receiving the no datat frame of described IrdaAck infrared state representative needs to send and replys.
3. low power consumption remote wireless meter-reading module according to claim 1 is characterized in that, described CPU control module adopts the CPU of low-power consumption.
4. low power consumption wireless meter reading module according to claim 1 is characterized in that described power control unit is directly powered by battery.
5. low power consumption wireless meter reading module according to claim 1 is characterized in that, it is described GPRS module for power supply that described power control unit adopts high efficiency low rising switching power source chip.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102571917A (en) * | 2010-12-02 | 2012-07-11 | 马斯科公司 | Water usage monitoring system |
| CN102003986B (en) * | 2009-09-01 | 2012-10-03 | 深圳市兴源鼎新科技有限公司 | Data reading and transmitting device for wireless meter reading and low power consumption running method thereof |
| CN103281523A (en) * | 2013-06-07 | 2013-09-04 | 四川晨光信息自动化工程有限公司 | Telemetering terminal with video monitoring function and low power consumption characteristic |
| CN104574706A (en) * | 2015-01-26 | 2015-04-29 | 北京迪创伟业科技有限公司 | Handheld POS system used for wireless meter reading |
| CN104992547A (en) * | 2015-07-13 | 2015-10-21 | 威胜集团有限公司 | Data transmission method between electric energy meter and master station |
| CN114222205A (en) * | 2021-12-09 | 2022-03-22 | 福建省水投数字科技有限公司 | Infrared-based low-power-consumption intelligent water meter reading system and method and intelligent water meter |
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2008
- 2008-12-23 CN CN2008102075469A patent/CN101447124B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003986B (en) * | 2009-09-01 | 2012-10-03 | 深圳市兴源鼎新科技有限公司 | Data reading and transmitting device for wireless meter reading and low power consumption running method thereof |
| CN102571917A (en) * | 2010-12-02 | 2012-07-11 | 马斯科公司 | Water usage monitoring system |
| CN103281523A (en) * | 2013-06-07 | 2013-09-04 | 四川晨光信息自动化工程有限公司 | Telemetering terminal with video monitoring function and low power consumption characteristic |
| CN103281523B (en) * | 2013-06-07 | 2016-08-24 | 四川晨光信息自动化工程有限公司 | There is the telemetering terminal of video monitoring function and low power consumption characteristic |
| CN104574706A (en) * | 2015-01-26 | 2015-04-29 | 北京迪创伟业科技有限公司 | Handheld POS system used for wireless meter reading |
| CN104992547A (en) * | 2015-07-13 | 2015-10-21 | 威胜集团有限公司 | Data transmission method between electric energy meter and master station |
| CN114222205A (en) * | 2021-12-09 | 2022-03-22 | 福建省水投数字科技有限公司 | Infrared-based low-power-consumption intelligent water meter reading system and method and intelligent water meter |
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| CN101447124B (en) | 2010-08-18 |
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