CN103940476A - Self-power-generation low-power-consumption water meter design and implementation method - Google Patents
Self-power-generation low-power-consumption water meter design and implementation method Download PDFInfo
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- CN103940476A CN103940476A CN201310023295.XA CN201310023295A CN103940476A CN 103940476 A CN103940476 A CN 103940476A CN 201310023295 A CN201310023295 A CN 201310023295A CN 103940476 A CN103940476 A CN 103940476A
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Abstract
The invention relates to a self-power-generation low-power-consumption water meter design and implementation method. At present, industrial and civil water metes are all mechanical water meters, water usage amount is indicated through a set of pointer meters in an accumulated mode, data are not visual and meter reading is difficult. Water meters used in enterprises and public institutions are always installed on underground pipelines, and accordingly the meters are inconvenient to read. The mechanical water meters can not directly output water usage amount electric signals, and it is difficult to monitor and control city water supply systems through computers. Accordingly, it is an inevitable requirement of technology development to replace the traditional mechanical water meters by developing a novel digital water meter. The invention discloses a water meter with an MSP430 single chip microcomputer as the core. A circuit of the water meter can be powered up through hydropower, the water meter is accurate in metering, convenient to use and extremely low in power consumption, and data are displayed in real time. Besides, a liquid crystal screen serves as a display part, so that friendliness of man-machine interaction is improved. As the novel digital water meter, the water meter can achieve digital display of water flow on the condition that external power supplies do not need to be added and power supplies do not need to be replaced, and continuous power supply is achieved, and long-time normal use of the water meter can be guaranteed.
Description
Technical field
The present invention is a kind of Novel digital type water meter, it take MSP430 single-chip microcomputer as core controller, adds stator on wheel shaft, adds annular magnetic pole on impeller, and utilize water impact impeller to generate electricity as circuit provides power supply, accurate measurement, easy to use, extremely low power dissipation, the water meter that data show in real time.As a kind of Novel digital type water meter, it has mainly solved is not needing additional or is changing under the condition of power supply and can show discharge and uninterrupted power supply problem, thereby has guaranteed the water meter use of can normally working for a long time.Belong to automation field.
Background technology
At present, along with social development and scientific and technological progress, measurement instrument is towards robotization, intellectuality, electronic future development.Wherein, having the self electricing generation water meter of spontaneous electrical function by external driver, can realize the wired or wireless transmission to data, thereby utilize computing machine to carry out automatic intensive data processing, charging etc., is the developing direction of following water meter.Industry and domestic water meter are all mechanical water meters at present, and water consumption is accumulated indication by one group of pointer gauge, because data are not directly perceived, checks meter cumbersome; The water meter that enterprises and institutions are used is often installed on underground pipeline, brings inconvenience to the work of checking meter; Mechanical water meter can not directly be exported water consumption electric signal, adopts computer monitor and control work to cause difficulty also to urban water supply system.
Different water meters structurally has certain similarity.Various water meters are gradually to electric-controlled type, intelligent direction development, and its more traditional various Purely mechanical fluid meters have structurally had substantial change.The difference of itself and traditional various Purely mechanical fluid meter maximums is that it will consume electric energy.Relevant regulations according to national standard to intellectual water meter, hotlist, should be greater than 5 years the serviceable life of internal battery.In order to extend power-on time, be all to adopt high energy battery to extend working time at present.Or must reduce Overall Power Consumption or strengthen battery capacity, and battery capacity increasing must make battery volume increase, and fails to lay down, or need to increase the shell dimension of fluid meter in the too large fluid meter of battery volume; The reduction of Overall Power Consumption is subject to again the restriction of hardware and software, particularly in can turn-offing fluid meter, contains the solenoid valve that power consumption is larger, and the battery of general capacity can not meet the demands, and needs often to change battery.Existing electric-controlled type fluid meter have to adopt Alternating Current Power Supply, and Alternating Current Power Supply has limited the usable range of fluid meter to a certain extent.Because battery life is limited, user will often change battery when using water meter, this disadvantages affect promoting the use of of electronic water meter.
Provide in the present invention a kind of stator that adds on wheel shaft, on impeller, add annular magnetic pole, and utilize water-energy generating electricity to provide power supply, accurate measurement, the water meter that easy to use, data show in real time for circuit.This programme be take MSP430 single-chip microcomputer as core, can realize the normal work that guarantees system under low power consumpting state.In addition, with liquid crystal display, as display unit, improved the friendly of man-machine interaction.As a kind of Novel digital type water meter, it has mainly been realized does not need numeral additional or that change the Water Under flow of power supply to show and uninterrupted power supply problem, thereby has guaranteed the water meter use of can normally working for a long time.
Summary of the invention
The present invention is to provide a kind of stator that adds on wheel shaft, on impeller, add annular magnetic pole, and utilize water-energy generating electricity to provide power supply, accurate measurement, the water meter that easy to use, data show in real time for circuit.This circuit be take MSP430 single-chip microcomputer as core, can realize the normal work that guarantees system under low power consumpting state.As a kind of Novel digital type water meter, it has mainly been realized does not need numeral additional or that change the Water Under flow of power supply to show and uninterrupted power supply problem, thereby has guaranteed the water meter use of can normally working for a long time.
As shown above, current, through can producing low-voltage by power generation turbine, boost via supply module, and rectification can directly be supplied with single-chip microcomputer and use after voltage stabilizing.The waveform transformation of the similar sine wave of the low-voltage alternating-current electric forming that pulse generation module can send according to turbine on the other hand become can for single-chip microcomputer counting square wave, calculate by a certain percentage the discharge of passing through, thus on LCD demonstration water flow data in real time.This numeral that just can realize without the Water Under flow of additional or replacing power supply shows and uninterrupted power supply problem.
City tap-water cause, as the important component part of urban infrastructure, is the main foundation industry of China's urban construction.Along with the develop rapidly of China's economy and information industry, tap water toll administration also will be towards electronization, information-based future development.Self-generating intelligent water meter is as a kind of product of complying with water supply industry development need, and its appearance has improved greatly and under conventional management pattern, exists the not obvious and power supply of data to change problem, has changed existing water mechanism, has strengthened people's consciousness of saving water.Therefore, its popularization, apply and have very much a market potential.The intellectual water meter system that the present invention studies proposes just under these circumstances, concrete theing contents are as follows of inventing:
1. water impact impeller electricity generation system;
2. booster system;
3. low power dissipation design;
Accompanying drawing explanation
Fig. 1 design flow diagram of generating electricity
Fig. 2 generator schematic diagram
The many voltage doubling rectifing circuits of Fig. 3
Fig. 4 bridge rectifier circuit
Fig. 5 pulse acquisition circuit
Embodiment
In the present invention, the design of electricity generation module and realization flow figure are as shown in Figure 1.Mainly by booster circuit, AC/DC circuit and mu balanced circuit etc., partly formed.The schematic diagram of turbine generation as shown in Figure 2.
1. booster circuit design
The place that need use high voltage, little electric current at some, is usually used voltage doubling rectifing circuit.Voltage multiplying rectifier, can be lower alternating voltage, and with withstand voltage lower commutation diode and capacitor, " whole " goes out a higher DC voltage.Utilize the memory action of filter capacitor, by a plurality of electric capacity and diode, can obtain the output voltage times over transformer secondary voltage, voltage doubling rectifing circuit is generally how many times of input voltage by output voltage, is divided into two multiplication of voltages, three multiplication of voltages and many voltage doubling rectifing circuits.
Figure 3 shows that many voltage doubling rectifing circuits, under no-load condition, the voltage on C1 is
voltage on C2～C6 is
therefore, using C1 two ends as output terminal, the value of output voltage is
using C2 two ends as output terminal, and the value of output voltage is
the upper voltage of C1 and C3 of usining is added as output, and the value of output voltage is
, the rest may be inferred, from diverse location output, can obtain
the output voltage of 4,5,6 times.
2. exchange and turn DC circuit design
As shown in Figure 5, it is comprised of power transformer, four commutation diode D1～4 and pull-up resistor RL bridge rectifier circuit.Four commutation diodes are connected into electric bridge form, therefore claim bridge rectifier.At the positive half cycle of u2, D1, D3 conducting, D2, D4 cut-off, electric current is got back to level lower end by TR level upper end TR time through D1 → RL → D3, obtains a half-wave commutating voltage on load RL.At the negative half period of u2, D1, D3 cut-off, D2, D4 conducting, electric current is got back to level upper end by the lower end of Tr level Tr time through D2 → RL → D4, obtains another half-wave commutating voltage on load RL.
So just on load RL, obtain a voltage waveform identical with full-wave rectification, the calculating of its electric current is identical with full-wave rectification, be UL=0.9U2, the average current that IL=0.9U2/RL flows through each diode is ID=IL/2=0.45U2/RL, and the high backward voltage that each diode bears is
(for half of full-wave rectification)
At present, four commutation diodes of miniwatt bridge rectifier circuit, are packaged into a rectifying device after being connected into bridge road, claim " silicon bridge " or " bridge heap ", and easy to use, rectification circuit is also often reduced to the form of Fig. 4 (c).Bridge rectifier circuit has overcome full-wave rectifying circuit requirement transformer secondary output has center tap and diode to bear the shortcoming that back-pressure is large, but multiplex two diodes.Fast in semiconductor device development, lower-cost today, this shortcoming is not outstanding, thereby bridge rectifier circuit is applied comparatively extensive in practice.
3. the realization of pulse generation module
In the present invention, the base table of water meter adopts the rotary wind type cold-water meter that meets IS04064B standard.This table counting mechanism and measuring mechanism close transmission through magnetic lotus root, adopt tongue tube sensor metering sender, and 0.01m often flows through
3during water, produce a pulse.The many countings phenomenon producing in order effectively to prevent various possible interference shakes, in the design, adopt double dry-reed pipe dipulse to count by the Anti-shaking circuit input MSP430 single-chip microcomputer being formed by electric capacity and resistance, when having pulse input successively, two pulse input sections just produce an effective impulse counting, two pulses have interlock function, and the P1.3 of single-chip microcomputer and P1.4 are as pulse input end.As shown in Figure 5.Pulse of every input, just adds up the water consumption of Yi Ge unit at storer.In table, be provided with device affording magnetic protection, there is stronger anti-outer magnetic interference ability.
4.MSP430 low power dissipation design strategy
Want to utilize in maximum efficiency the energy of battery, extend the battery of portable apparatus, except the basis that selection Low-voltage Low-power device is hardware, must work out and there is the software of power management function flexibly.
● the basic module of microprocessor internal has power switch separately, only has in use and just opens.For example, while carrying out impulse sampling, start timer Timer_a, start to catch; When sampling finishes, timeing closing device, forbids catching immediately.
● the pulse producing due to current belongs to slow variable element, thereby the collection of pulse adopts timer interrupt mode can not affect the result of measurement.After CPU initialization, enter immediately low-power consumption mode, wait for and interrupting.Timer interrupts waking CPU up and carries out temperature acquisition, data processing, and temperature value is now deposited in Flash Ram, and after being disposed, CPU enters low-power consumption mode again.
● the intelligent management to CPU state.MSP430 single-chip microcomputer has 5 kinds of low-power consumption modes (Low_power mode), LMP0～LMP4 (sequence number is higher, and the power consumption under this pattern is lower).When not carrying out pulse collection, CPU is in low-power consumption mode LMP3.VCC=3V, f (ACLK)=32768Hz, and the working current under this pattern only has 2uA.Be less than 6uS the switching time from low-power consumption mode to mode of operation.
● in order to reduce the consumption of electric current, 3 I/O mouth lines using in pulse data Acquisition Circuit, at ordinary times all in high-impedance state, in data acquisition, CPU is switched to output state by a corresponding mouthful line.
● increase power supply measuring ability.Once non-water flow passes through, force CPU in LMP4 pattern.Under this pattern, the electric current that complete machine consumes is almost nil.LMP4 can only be waken up by the external break events being allowed to.
Claims (5)
1. a low power consumption digital display water-meter for novel self power generation, utilizes water-energy generating electricity to provide power supply for circuit.
2. the low power consumption digital display water-meter of self power generation according to claim 1, it is characterized in that adding stator on wheel shaft, on impeller, add annular magnetic pole, and utilize water-energy generating electricity to provide power supply, accurate measurement, the water meter that easy to use, data show in real time for circuit.
3. the low power consumption digital display water-meter of self power generation according to claim 1, is characterized in that this circuit take MSP430 single-chip microcomputer as core, can realize the normal work that guarantees system under low power consumpting state.
4. the low power consumption digital display water-meter of self power generation according to claim 1, is characterized in that as a kind of Novel digital type water meter, and the numeral that it has mainly realized the Water Under flow that does not need additional or replacing power supply shows and uninterrupted power supply problem.
5. the low power consumption digital display water-meter of self power generation according to claim 1, is characterized in that having designed water impact impeller electricity generation system, booster system, low power dissipation design.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330123A (en) * | 2014-11-04 | 2015-02-04 | 焦彬彬 | Pulse direct-reading water meter device with self electricity generating capability |
| CN105277245A (en) * | 2015-11-05 | 2016-01-27 | 山东潍微科技股份有限公司 | Self-generating sensing starting working device |
| CN105547614A (en) * | 2016-01-15 | 2016-05-04 | 苏州创必成电子科技有限公司 | Short-range self-powered pipeline fluid flow monitor |
| CN105628099A (en) * | 2016-01-15 | 2016-06-01 | 苏州创必成电子科技有限公司 | Remote self-power pipeline fluid flow monitor |
| CN105987721A (en) * | 2015-01-27 | 2016-10-05 | 深圳市博电电子技术有限公司 | Water consumption display system and method |
| CN107359685A (en) * | 2017-07-31 | 2017-11-17 | 辽宁航宇星物联仪表科技有限公司 | A kind of intelligent gas meter self charger |
| CN109163754A (en) * | 2018-08-31 | 2019-01-08 | 吴晓红 | A kind of pipeline pollution monitoring device based on bernoulli principle and the raw electricity of magnetic |
| CN111442811A (en) * | 2020-03-17 | 2020-07-24 | 河北建投水务投资有限公司 | Intelligent data acquisition and self-power generation integrated terminal and method |
| CN113092811A (en) * | 2021-04-13 | 2021-07-09 | 浙江大学 | Floating type wind speed monitor based on nano generator |
| CN114123441A (en) * | 2018-11-06 | 2022-03-01 | 武汉领普科技有限公司 | Self-powered method and device based on polarity detection |
| CN115265675A (en) * | 2022-09-01 | 2022-11-01 | 迪弓科技(无锡)有限公司 | Self-generating flow detection system |
-
2013
- 2013-01-18 CN CN201310023295.XA patent/CN103940476A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330123A (en) * | 2014-11-04 | 2015-02-04 | 焦彬彬 | Pulse direct-reading water meter device with self electricity generating capability |
| CN105987721A (en) * | 2015-01-27 | 2016-10-05 | 深圳市博电电子技术有限公司 | Water consumption display system and method |
| CN105277245A (en) * | 2015-11-05 | 2016-01-27 | 山东潍微科技股份有限公司 | Self-generating sensing starting working device |
| CN105547614A (en) * | 2016-01-15 | 2016-05-04 | 苏州创必成电子科技有限公司 | Short-range self-powered pipeline fluid flow monitor |
| CN105628099A (en) * | 2016-01-15 | 2016-06-01 | 苏州创必成电子科技有限公司 | Remote self-power pipeline fluid flow monitor |
| CN107359685A (en) * | 2017-07-31 | 2017-11-17 | 辽宁航宇星物联仪表科技有限公司 | A kind of intelligent gas meter self charger |
| CN109163754A (en) * | 2018-08-31 | 2019-01-08 | 吴晓红 | A kind of pipeline pollution monitoring device based on bernoulli principle and the raw electricity of magnetic |
| CN114123441A (en) * | 2018-11-06 | 2022-03-01 | 武汉领普科技有限公司 | Self-powered method and device based on polarity detection |
| CN114123441B (en) * | 2018-11-06 | 2024-03-15 | 武汉领普科技有限公司 | Polarity detection-based self-powered method and device |
| CN111442811A (en) * | 2020-03-17 | 2020-07-24 | 河北建投水务投资有限公司 | Intelligent data acquisition and self-power generation integrated terminal and method |
| CN113092811A (en) * | 2021-04-13 | 2021-07-09 | 浙江大学 | Floating type wind speed monitor based on nano generator |
| CN115265675A (en) * | 2022-09-01 | 2022-11-01 | 迪弓科技(无锡)有限公司 | Self-generating flow detection system |
| CN115265675B (en) * | 2022-09-01 | 2024-01-30 | 迪弓科技(无锡)有限公司 | Spontaneous current amount detection system |
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Application publication date: 20140723 |